Understanding Shore Hardness: Choosing the Right Softness for Pet Toys

Pet toy designers often face a critical material decision: how soft or hard should the toy be? As a silicone manufacturing factory, we know that getting the Shore hardness right is key to a toy’s success. The hardness of a silicone or natural rubber toy affects its durability, flexibility, and, most importantly, pet safety. In this post, we’ll demystify Shore hardness (including the Shore A and Shore 00 scales) and explore how different hardness levels suit various pet types – from gentle puppies and cats to power-chewing dogs. We’ll also share insights on selecting the optimal material hardness for different pet toy styles (chew toys, fetch toys, treat-dispensers) and discuss how manufacturers test and ensure quality. By the end, you’ll see why collaborating with your material supplier on hardness selection can make all the difference in creating safe, enjoyable pet toys.

Contents hide
1 What Is Shore Hardness?
2 How Hardness Affects Durability, Flexibility, and Safety
3 Silicone vs. Natural Rubber: Material Matters
4 Selecting the Right Hardness for Different Pets
5 Typical Hardness Ranges by Toy Type
6 Manufacturing Testing and Quality Control
7 Conclusion

What Is Shore Hardness?

Shore hardness measures a material’s resistance to indentation – essentially how “hard” or “soft” it is. The measurement is done with a spring-loaded device called a durometer, which presses a standardized needle into the material’s surface. The depth of indentation is converted to a hardness value on a scale of 0 to 100, where higher numbers mean a harder material. A reading of 0 would indicate an extremely soft gel, while 100 would be as hard as a solid plastic or glass. In practice, most rubbery materials fall somewhere in between.

Shore Hardness Scales (A and 00): There are several Shore scales for different material types. The two most relevant for pet toys are Shore A and Shore 00. Shore A is the standard scale for flexible rubbers, silicone elastomers, and soft plastics. It covers materials from very soft and stretchy (low Shore A) to semi-rigid (high Shore A). Shore 00 is a separate scale used for extra-soft materials like gels, foams, or sponges that are too soft to measure accurately on Shore A. For example, a memory foam or silicone gel might be measured in Shore 00 units. Both scales run 0–100, but Shore 00 uses a different indenter shape and pressure suitable for ultra-plush materials. (There’s also Shore D for hard plastics, which isn’t typically applicable to pet chew toys.) In short, most solid silicone and natural rubber pet toys are rated on the Shore A scale, while something exceedingly soft (imagine a squishy gel pet mat) would use Shore 00.

Shore hardness

Image Source:smooth-on
Shore hardness comparison chart: The Shore 00 scale covers very soft, gel-like materials (like gummy candies or gel insoles), while Shore A covers soft rubbers up to semi-rigid plastics. 

To put these numbers in perspective, common objects can help: a standard rubber band is around Shore A 20; a pencil eraser is roughly Shore A 40–50; typical car tire tread is about Shore A 70. That means a material at Shore A 20 is very soft and easily indented (much like a gummy candy or silicone gel insole), whereas Shore A 70 feels quite stiff (you can barely dent a car tire by pressing). Shore 00 materials are even softer – for instance, a marshmallow might be ~10 Shore 00 and a gel shoe insole ~30 Shore 00. Pet toys usually don’t go into the Shore 00 range unless they are extremely soft foam toys (which are generally not durable for chewing). In practice, pet toy materials (silicone, natural rubber, TPE) tend to span from about 15 Shore A up to 80+ Shore A in hardness, depending on the application.

How Hardness Affects Durability, Flexibility, and Safety

Hardness vs. Softness – what’s the trade-off? The hardness of a toy material directly influences its feel and performance. Softer rubbers (lower Shore values) are more elastic and compressible – they offer a gentle “mouth feel” and flexibility. This can be great for a teething puppy or a toy that needs to bend easily. However, very soft materials can also tear or abrade more easily under sharp teeth. On the other hand, harder rubbers (higher Shore values) are tough to dent or puncture – they tend to last longer against aggressive chewing and hold their shape under force. The downside is that an overly hard toy might be too rigid, less fun to chew, or even pose a risk of tooth damage if the dog bites down too hard. As one guide explains, softer silicones are gentle and flexible, whereas harder silicones provide strength for tough use – finding the balance is key.

Durability: In general, increasing hardness improves a material’s resistance to puncture and wear, up to a point. A firm silicone or rubber (say Shore A 70) will withstand powerful jaw pressure better than a Shore A 30 silicone, which a big dog could likely shred quickly. Manufacturers often formulate “tough chew” toys in the Shore A 60–80 range so they won’t rip apart under aggressive chewing. Some “indestructible” toy designs even use materials as hard as 70–90 Shore A – comparable to a skateboard wheel in stiffness – to survive the most persistent chewers. However, harder isn’t always better: if a toy is extremely hard, the pet might lose interest or risk tooth injury. That’s why one industry guideline for rubber chew balls is to avoid going too hard – “look for toys with a hardness of 60–70 Shore A” to prevent harming the dog’s teeth. In other words, the goal is maximum durability without becoming dangerously hard.

Flexibility and Bounce: Softer materials flex and stretch more. A low-durometer silicone can often elongate hundreds of percent and still spring back. This flexibility can be useful – for example, a soft rubber toy will deform under a pet’s bite, which can make it more satisfying to chew and can help scrub their teeth or massage their gums. Soft toys are also easier for pets to grip and carry. Additionally, softness can contribute to a toy’s bounce – up to a point. A medium-hard rubber ball (around Shore A 50–60) typically has a nice bounce for fetch games, whereas a very soft ball might just thud, and an extremely hard one (Shore 90+) might not bounce much either (more like a rock). Fetch toys therefore use a mid-range hardness to achieve an elastic rebound while retaining shape. For example, many high-quality fetch balls use natural rubber around Shore A 55–65, which gives a good mix of bounce and toughness (a famous example being the orange and blue fetch balls known for their high bounce, made of resilient rubber in that hardness range).

Pet Safety (Teeth and Gums): Hardness also ties directly into safety and comfort. A softer toy is gentle on teeth and gums, making it ideal for puppies, senior dogs, and any pet with sensitive mouths. Soft, flexible silicone or latex will compress under bite force, reducing the risk of tooth fractures. That’s why puppy-specific toys use softer rubber formulas – the KONG™ Puppy, for instance, uses a gentle natural rubber around 30 Shore A to protect young teeth. Conversely, a very hard toy can actually be too abrasive or rigid, potentially wearing down teeth or even cracking them if a dog bites down wrong. Veterinary dentists often warn against extremely hard chews (like some antlers or hard nylon toys) for this reason. In terms of Shore hardness, anything much above ~80A is quite stiff – not something you’d want a dog gnawing on for long. Even at 70A, caution is advised: that’s roughly the hardness of a tire tread, and while durable, it’s borderline on what a dog’s teeth should repeatedly bite. On the flip side, if the toy is too soft (low durometer) and the pet can bite pieces off easily, that’s a choking or ingestion hazard. Thus, finding the right hardness is a safety balancing act – soft enough to be tooth-friendly, but hard enough to resist being torn into small pieces. For example, a treat-dispensing toy might lean softer so it’s pleasant to chew and interact with, whereas a “power chewer” bone will be made much firmer to avoid large chunks being ripped off.

Material Composition Notes: It’s worth noting that hardness is one controllable aspect of a material’s formulation. By adjusting the silicone or rubber mix (for instance, the ratio of polymer to fillers, or the curing agent level), manufacturers can “tune” the Shore A hardness to a target value. This means the same base material can often be made in a soft version or a hard version. In our factory, we routinely customize silicone compounds in a range of durometers (e.g. offering a pet toy design in 50A or 70A as needed). Hardness will also correlate with other properties: softer elastomers usually have lower tensile strength and tear strength, while harder ones tend to have higher tensile/tear but lower elongation. For instance, a 30A silicone might stretch like crazy but tear if pulled too far, whereas a 70A silicone is strong and won’t stretch much before it snaps. These are technical nuances, but they underlie why extreme softness can compromise durability, and extreme hardness can raise brittleness – reinforcing the need for a balanced approach.

Silicone vs. Natural Rubber: Material Matters

Two of the most popular pet toy materials are silicone (synthetic rubber) and natural rubber (latex). Both are elastomers available in various hardnesses, and each has its pros and cons for pet products.

Silicone Rubber: Silicone is a lab-made polymer known for its purity and stability. High-quality silicone (especially food-grade silicone) contains no harmful additives and is free of BPA, phthalates, and latex proteins. This makes it a top choice for pet toys that might double as treat holders or that owners want to be sure are non-toxic. Silicone can also withstand extreme temperatures – it won’t deform in boiling water (helpful for sterilizing a toy) and resists UV light and weathering without degrading. In terms of hardness, silicone elastomers are typically available in roughly Shore A 20 up to Shore A 80 for solid products. Most pet silicone toys fall in the 30–70A range as a practical matter. Silicone at a given hardness tends to be a bit “springy” and has a smooth, almost silky surface feel. One thing to note: silicone’s tear strength, while decent, is often a bit lower than natural rubber’s. If a silicone toy is too thin or too soft, a determined chewer can tear it. Manufacturers compensate by designing silicone toys with thicker walls or solid shapes and avoiding sharp corners that could tear. On the whole, silicone is prized for being safe, hygienic, and fairly durable – a well-designed silicone chew toy can be very resilient, and it won’t get soggy or rot. And if your pet (or customer) has a latex allergy, silicone is a perfect latex-free alternative.

Natural Rubber: Natural rubber comes from rubber tree latex and has been used in pet toys for decades (the iconic KONG® chew toys are made of natural rubber, for example). Natural rubber is extremely elastic and generally has higher tensile and tear strength than equivalently soft silicone. This means it can often withstand aggressive chewing a bit better, especially in lower hardness ranges. Natural rubber also has a certain “bounce” and grippy texture that dogs love – it’s not as silky as silicone, which can be a pro or con depending on the toy. In terms of hardness span, natural rubber can be formulated from very soft to very hard as well. The KONG product line nicely illustrates this: KONG Puppy toys are made of a soft natural rubber around ~30 Shore A, the classic red KONG is medium firmness around ~50 Shore A, and the KONG Extreme (black) uses an extra-dense natural rubber near ~80–90 Shore A. So natural rubber covers the full spectrum from puppy-soft to power-chewer hard. A few considerations: Natural rubber is an organic material and can age – over years it might develop surface oxidation or get a bit brittle (ever seen an old rubber band that crumbles?). It also can produce a slight latex odor that some find off-putting (though pets often don’t mind). Moreover, the latex proteins can be allergens for a small percentage of people and potentially pets (though canine latex allergy is rare). Still, natural rubber is very safe for most dogs, and its performance is comparable to silicone in chew toys. Some pet brands even advertise “all-natural rubber” as a selling point. One advantage we see is that natural rubber’s high tear strength allows slightly softer formulations to be used without tearing – for instance, a 40A natural rubber toy might hold up better against tearing than a 40A silicone toy, all else equal. The choice between silicone and natural rubber often comes down to design and branding: silicone offers superior colorability, heat resistance, and chemical inertness, while natural rubber offers a classic feel and possibly better raw tear durability. Many ultra-durable toys actually blend the two (or mix synthetic rubber with natural rubber) to hit an optimal hardness and toughness.

Bottom line: Both silicone and natural rubber can be excellent for pet toys. Both can be made in a range of hardness levels to suit different needs. The key is to specify the right hardness and formulation for your particular toy’s purpose. For example, if you’re making a treat-dispensing toy that needs a bit of flex to release treats, you might choose a silicone at ~50A or a natural rubber at ~50A – either could work, and both would be safe. If you need an extreme-duty chew stick, perhaps a natural rubber at 80A or a high-durometer silicone blend is the way to go. A knowledgeable manufacturer (like us) will guide you on material selection, taking into account not just hardness but also factors like manufacturing method (injection vs. compression molding), achievable shapes, and any certifications (FDA food grade, etc.) required.

Selecting the Right Hardness for Different Pets

Not all pets play the same. A small terrier, an aggressive pit bull, a kitten, and a teething puppy all have very different toy needs. Here we break down recommended hardness ranges by pet type, to help brands and designers choose wisely:

  • Puppies (Teething or Light Chewers): For young puppies (and even senior dogs with sensitive mouths), softer is better. Typically, Shore A 15–30 is ideal for puppy toys. This softness allows the toy to compress gently, soothing sore gums and not harming baby teeth. (For context, a pencil eraser is about 30A – puppy toys are around or even below that softness.) These toys will feel very pliable if you squeeze them. Common examples are puppy chew rings or plush-filled rubber toys that you can indent with your thumb. The KONG Puppy, as mentioned, is ~30A natural rubber. Such toys might show bite marks over time (since they are soft), but that’s acceptable as long as chunks aren’t coming off – the goal is a comfort chew. Manufacturers may design these toys to be thicker or in gentle shapes to compensate for the lower material strength at that softness. Always ensure puppy toys are non-toxic and free of loose bits, since puppies will mouth them a lot.

  • Small Dogs (Adult small breeds, moderate chewers): Smaller dogs (e.g. under 20 lbs) often do best with a medium-soft to medium hardness – roughly Shore A 30–５０ range. Why? A tiny dog’s jaw can’t typically generate the force of a large dog, so they don’t need an ultra-hard material to get durability. In fact, if it’s too hard (say a 70A toy), a small dog might not even be able to compress it at all, making the toy uninteresting. So for small breeds, we often recommend somewhere around 40A–50A: firm enough to last, but with a bit of “give” when they bite. Around Shore 40–50A, a toy is about as hard as a car’s rubber door seal or a shoe sole – you can flex it, but it’s tough. Many generic rubber toys and balls marketed for small dogs fall in this middle ground. It’s also a safe zone in terms of not damaging their smaller teeth. If the dog is an aggressive chewer despite its size, lean to the upper end (50–55A) and use a tear-resistant formulation. If the dog is gentle, you could lean softer (30–40A). Also consider toy size – small dogs need physically smaller toys, which in turn should usually be a bit softer because there’s less bulk to withstand force. (Pro tip: a thin toy made of very hard rubber can crack; if you must use a hard material, ensure the design is thick enough.)

  • Large Dogs & Aggressive Chewers: For big breeds or any dog that’s a notorious power chewer (regardless of size), harder materials are warranted. These pets can crunch through flimsy toys in minutes. Typically we suggest Shore A 60–80 for aggressive chewers. At ~60A and above, rubber starts to get quite tough – a human can barely dent it with a fingernail. Chew toys in this category (think of black “extreme” rubber toys, heavy-duty rubber balls, etc.) will hold up far better under strong jaws. For example, an “indestructible” chew stick might be made of 70–75A rubber (comparable to a skateboard wheel or hard hat in stiffness). Some extreme toys even go nearly to 90A (though we caution, beyond ~85A you risk the toy being too hard for safe chewing, as discussed). A good strategy is multi-layer construction: some high-end chew toys have a tough core around 60–65A and a slightly softer outer layer around 45–50A. This gives a bit of a cushion on the surface but a durable heart inside. If you design a toy for aggressive chewers, you’ll also want to ensure it’s physically large enough that the dog can’t fit the whole thing in its mouth (to prevent choking) and that there are no weak points (like narrow appendages) that invite tearing. Material-wise, natural rubber is popular for these tough toys (it can be formulated very hard but still with slight elasticity). Reinforced TPR (thermoplastic rubber) blends are also used around 70–80A. And some brands use nylon or polypropylene elements for ultra-hard parts, but those are plastics on a different hardness scale (and not “soft” at all – more like bone). As a silicone manufacturer, we’d note that silicone in the 80–90A range can be made, but it’s quite rigid – often, we’d instead recommend a composite of silicone and fabric or a dual-hardness approach for extreme chewers. In summary, give your power chewer toys a fighting chance by using very firm, high-durometer rubber – just don’t exceed what’s safe for teeth (usually max ~90A).

  • Cats: Feline play behavior is different from dogs – cats are generally not chewing with massive force, but they do claw, bite lightly, and carry toys in their mouth. Many cat toys are actually plush or hard plastic, but there are silicone and rubber cat toys too (e.g. treat-dispensing cat toys, cat chew toys for dental health, or interactive balls). For cat applications, softer rubber is usually preferred, both to entice the cat and for safety. A cat’s teeth are small and sharp; a very hard material provides no satisfaction for them to bite and could even crack a tooth (yes, cats can fracture teeth on very hard objects too). Thus, we’d recommend cat chew toys be around Shore A 20–40, on the softer side. This gives a nice squishy feel if a cat gnaws on it and is gentle on their teeth. Soft silicone also has an interesting “mouthfeel” that some cats like (similar to how they chew on soft silicone straws or earbuds). If the toy is a ball or something meant to be batted around, a medium firmness (around 40A-50A) might be used to ensure it’s durable and bouncy enough – but in those cases, the cat isn’t usually biting hard into it. Cat treat-dispensing toys (like little food-dispensing balls) could be in the 40–50A range for a bit of bounce and to hold their shape. One thing about cats: they are lighter and generally don’t destroy toys the way dogs do, so durability is less of a concern except for scratching. A softer toy (say 30A silicone) will hold up fine to cat claws and occasional nibbling, as long as it’s thick enough. And since cats often like to carry toys in their mouth, the lightweight nature of a softer silicone is a bonus. In short, for cats we lean soft – you’re rarely going to need a “hard” rubber for a cat product, and keeping it soft makes the toy more attractive for them to pounce, kick, and lightly chew.

Typical Hardness Ranges by Toy Type

Another way to choose material hardness is by considering the type of toy you’re making. Chew toys, fetch toys, and treat toys each have different functional requirements:

  • Chew Toys: This category covers toys meant to be gnawed on for extended periods (rubber bones, chew sticks, dental chews, etc.). The hardness depends on the target chewer. For a gentle chew toy or puppy chew, you might go as soft as Shore A 20–30 (very soft, as discussed). For a standard all-purpose dog chew toy, somewhere around Shore A 50–60 is common – durable but still with some flex. And for heavy-duty chew toys marketed as “tough” or “indestructible,” you’ll see Shore A 70–85 materials. For example, a thick rubber dental chew for aggressive chewers might be ~75A so that the teeth sink in only slightly (just enough to clean), and the toy doesn’t chunk off. Always err on the side of a little softer if unsure, because a chew toy that’s slightly too soft will just get cosmetic damage, whereas one that’s too hard could hurt a dog’s teeth. Many brands have tiered product lines: e.g., “soft chew” for seniors/puppies (around 30A), “medium chew” for average dogs (~50A), and “power chew” for strong jaws (~70A+). Our factory can produce custom hardness chew toys to fit those tiers easily. Also, squeaky chew toys (like squeaker balls or squeaky rubber bones) usually need to be in the mid-range hardness. They must be soft enough to depress and allow the squeaker to function, but hard enough to last. Typically, a squeaky rubber ball might be around 60–70 Shore A – as one buyer’s guide notes, that range avoids the toy being so hard it harms teeth, yet is firm enough to be durable.

  • Fetch Toys (Balls and Flyers): Fetch toys like balls, discs (frisbees), and tug toys have to handle impact (being thrown, bouncing, etc.) and often need good bounce or flight. Balls: A good fetch ball is usually a medium-firm natural rubber. Common hardness here is around Shore A 50–65. At ~50A, a ball has a nice bounce and can deform a bit when the dog grabs it, making it easy to pick up. Hardness much above 65A and the ball might get too stiff (and heavy) to have an exciting bounce – plus it could be unpleasant for the dog to catch. The popular Chuckit! Ultra Ball for example is lauded for durability and bounce; while we don’t have exact specs, the feel suggests it’s in that mid-durometer range (not squishy, but you can indent it a little by pressing). Flying discs (rubber frisbees): These need flexibility so they don’t crack, but also enough stiffness to hold a disc shape. Silicone or rubber flying discs are often around Shore A 40–60. A 40A disc will be very flexy (able to be crumpled up, good for safety), whereas a 60A disc is more rigid for longer flights. One of our customers makes a silicone fetch disc at ~50 Shore A – it can fold in your hand but flies decently, and if the dog bites it mid-air it flexes without hurting their mouth. Tug toys (rubber tugs or rings): They’re a bit different since they undergo pulling rather than impact. But generally, a tug toy made of natural rubber might be around 50–70A. You want it tough (to resist tearing when two dogs or a dog and human play tug-of-war), but if it’s too hard, it won’t have the enjoyable stretch. Many tug toys use reinforcement (like rope inside rubber) so hardness is less critical than design. Lastly, consider that fetch toys often double as chew toys when the dog is alone – so if you know the ball will be chewed, maybe opt for the higher end of hardness for durability. On the other hand, if you’re designing an indoor fetch toy or a light play ball, a softer material (even 30–40A) could be nice to avoid breaking lamps and to be gentle in the dog’s mouth. We’ve seen silicone spiky balls for dogs that are very soft (around 25A) intended for gentle indoor fetch and massage, for instance.

  • Treat-Dispensing Toys (Puzzle Toys): Treat or food-dispensing toys (like fillable rubber toys, slow-feed balls, etc.) have a unique goal: they should be firm enough to hold their shape with food inside, but ideally somewhat soft so the dog can bite and squeeze them to extract treats. The classic example is the KONG Classic, a treat-stuffable toy which is about Shore A 50 in hardness (medium firmness). That choice of hardness lets it flex when the dog chews, so treats can fall out or be worked out, but it’s not so soft that pieces tear off when the dog is focused on it. Generally, 40–60 Shore A is a good window for treat-dispensing toys. At 40A, the toy is quite soft – easy for a dog to compress, maybe suitable for mild chewers or for cold conditions (some treat toys are meant to be frozen with goodies inside, so they chose a softer base rubber knowing it will stiffen slightly when frozen). At 60A, a treat toy will be tougher and last longer, suited for dogs that would otherwise destroy a softer one. One manufacturer we know uses about 50A food-grade silicone for their treat puzzle toys, finding it a “sweet spot” that’s both flexible and durable. Also, treat toys often get gnawed continuously as the pet tries to lick out peanut butter or kibble, so the material must withstand a lot of repeated biting. We ensure our silicone for these toys has good tear strength (often adding a reinforcement or using a high-strength grade) so that even at 50A it doesn’t split at the opening. In summary, for puzzle toys: aim mid-range hardness; soft enough for interactivity, tough enough for longevity. (And always food-safe material since treats will be in contact – silicone shines here due to its inertness.)

Of course, there are other toy categories (e.g. interactive electronics encased in silicone, which often use soft silicone for a nice feel, or edible chews, which are another realm entirely). But for most solid silicone/natural rubber toys, the above guidelines apply. The main point is to match the hardness to the use case: softer for comfort and gentle play, harder for durability and challenge. When developing a new toy, think about the target pet and the toy’s purpose – this will guide the durometer choice. We often prototype a design in two or three hardness levels and do pet testing to see which performs best.

Manufacturing Testing and Quality Control

From a manufacturer’s perspective, ensuring the toy has the specified hardness and quality is crucial. In our silicone factory, we have strict quality control practices to verify every batch of toys meets the target specifications and safety standards:

  • Hardness Testing (Durometer Checks): We measure the Shore hardness of each production batch using calibrated durometer instruments. According to ASTM D2240 (the standard for Shore hardness), the test samples should be a certain thickness (at least 6 mm) and we take the reading ~1 second after pressing to get a consistent value. Our QC technicians use a Shore A durometer for most pet toys (and Shore 00 if we ever do very soft gels) to make sure, for example, that the “50A” toy you ordered is indeed 50A ± a small tolerance. If the hardness reading falls outside the agreed range, we adjust the material mix and re-mold. Maintaining consistent hardness is important not just for performance but also for customer expectations – a batch of toys that come out too soft might wear out faster, while too hard could violate safety aims. Therefore, hardness testing is a routine step in our production process. We use both analog and digital durometers, and they are regularly calibrated against reference blocks.

  • Tensile and Tear Strength Testing: Alongside hardness, we often test the tensile strength (how much pulling force the material can withstand) and tear resistance of the rubber compound used. This is done with specialized equipment like a tensile tester (which stretches sample strips of the rubber until they break). For tear, we might use a trouser tear test or similar per ASTM standards. These tests ensure that if we have formulated a softer rubber, it still has adequate strength to not split when a dog is chewing. For instance, if a certain Shore A 30 silicone isn’t meeting our tear strength criteria, we might need to modify the formulation (e.g. add a reinforcing filler or slightly increase hardness) before mass production.

  • Bite/Chew Simulation Tests: A very informative test we do for chew toys is a mechanical chew simulation. One setup involves a pneumatic or motor-driven clamp that repeatedly compresses the toy or a test slab of the material to mimic a dog’s bite. We might also perform a kind of “puncture” test using metal probe heads of various shapes (simulating canine teeth) to see how the material holds up. According to one pet toy company, rigorous durability testing can involve over 10,000 bite cycles on a toy to ensure it doesn’t tear or deform excessively. We adopt a similar mindset – for any new design, we’ll put it through cyclic chewing tests and inspect for damage. If a toy is meant for power chewers, we test it under even more extreme conditions (higher forces, more cycles). These tests help catch issues like weak spots or potential choke-hazard pieces coming loose.

  • Safety and Chemical Tests: We ensure all our silicone and rubber raw materials are certified non-toxic. This includes checking for things like lead, BPA, phthalates, or other harmful substances (many of the same tests as children’s toys, even though pet toys aren’t always legally held to that standard). For silicone, we often use platinum-cured, food-grade silicone that’s FDA/LFGB compliant. For natural rubber, we make sure it’s purified and free of nitrosamine-producing chemicals, etc. We also test that colors are colorfast and won’t leach dye when the toy is chewed or washed. Some clients ask for specific certifications or testing (for example, EU REACH compliance or California Prop65). Quality control in this area means working closely with material suppliers and sometimes sending toys to independent labs (like Eurofins or SGS) for analysis. A passed chemical safety test is as important as the physical durability.

  • Dimensional and Visual Inspection: Hardness aside, each toy is inspected for proper molding – no excess flash, no air bubbles or voids, no sharp edges. We verify that any design features (like treat holes, squeaker inserts, etc.) are correctly formed. If two materials are over-molded (say a hard core and soft outer layer), we check the bond strength between layers. Throughout a production run, our team does regular spot checks (for example, 10+ regular checks and 5 random checks per order as one quality plan) to catch any deviations. We use tools like calipers to measure critical dimensions and ensure consistency.

  • Hardness Tuning and Process Control: Achieving the desired hardness reliably is partly an art of compounding and processing. Our engineers control parameters like mixing time, temperature, and cure time precisely to hit the target durometer. For instance, longer cure or more curing agent can increase hardness in many rubber systems. We document these process settings so that once the ideal hardness is dialed in during prototyping, we can reproduce it for mass production. If a client wants two hardness options for a toy (say a 50A and a 70A version), we will have two separate formulations and possibly molding setups, and we keep strict separation to avoid any mix-ups.

  • Field Testing and Feedback: As a final quality step, we often conduct or encourage real-world testing of our toys. We provide sample toys to a few pet owners or even have an in-house test dog squad (some employees’ dogs volunteer!) to play with new toys. Their feedback – how quickly does the toy wear, do they show interest, any unexpected issues – is invaluable. This isn’t a quantifiable test like durometer reading, but it’s a key part of quality assurance for pet products. It helps verify that our lab testing correlates with actual pet usage. For example, a lab machine might not fully replicate a dog’s chewing pattern of “hold in paws and gnaw on one end,” so a dog test might reveal a weak point we didn’t anticipate. We treat these insights seriously and iterate the design or material if needed.

Through all these practices, the goal is to deliver consistent, safe, and effective pet toys. Whether it’s a silicone cat ball at 25A or a tough rubber stick at 80A, our factory’s quality systems make sure the hardness is on target and the toy will perform as promised when it’s in a pet’s jaws. We want pet brands to have confidence that when we say “this toy is suitable for aggressive chewers,” it truly has been engineered and verified to meet that claim.

Conclusion

Shore hardness might be a technical metric, but as we’ve seen, it has a very tangible impact on pet toy performance. The difference between a 30A and a 70A material in a chew toy could be the difference between a toy that’s shredded in minutes and one that lasts for months – or the difference between a toy a teething puppy loves and one it won’t touch. By understanding Shore hardness and choosing the right softness/firmness for the specific pet audience, brands can dramatically improve their toys’ success in the market. The sweet spot is always a balance: durable yet not dangerously hard, flexible yet not flimsy.

As a silicone manufacturing partner, we speak this language of durometers daily. We’re here to help pet product designers navigate these material decisions. Choosing the right material and hardness is not a one-size-fits-all formula – a lot depends on the pet’s size, age, chew strength, and the toy’s purpose. Our team can advise whether a high-tear natural rubber might suit your design better, or if a silicone of a certain Shore A with a specific additive would give the best results. We can even produce sample pieces in multiple hardness levels for you to evaluate.

Collaborate with your manufacturer early in the design process to dial in the hardness – it can save time and cost later by preventing failures or redesigns. If you’re developing a new pet toy (be it a chew, fetch, or treat toy), we encourage you to consult with us or another experienced materials supplier. We’ll help you select the optimal softness for safety and fun, and ensure rigorous quality control so every unit meets those standards. In the end, our goal aligns with yours: to deliver pet toys that are safe, high-quality, and tail-waggingly enjoyable.

Ready to create the perfect pet toy? Feel free to reach out to our team for expert guidance on silicone and rubber materials. With the right Shore hardness and our manufacturing know-how, your next pet toy product can truly stand out in durability and pet-approved performance. Let’s work together to make toys that pets love and owners trust!