By Graham FisherChoosing the right chew toy means matching the material to your dog’s chewing style, mouth strength, and how much time you are willing to spend on cleaning. Rubber chews flex and compress under a bite, while nylon chews are rigid and built to resist heavy gnawing. For the other popular category, puzzle toys, the choice is less about hardness and more about how your dog likes to solve problems.
The short answer
Rubber is the safer default for most dogs because it absorbs pressure and is less likely to damage teeth and gums. Nylon is the better default for extremely determined chewers who demolish softer toys and need a rigid surface to work on. Neither option is indestructible, and either can cause trouble if it breaks into pieces, so supervise chew sessions and take the toy away once it shows significant wear.
You should also match the size of any chew to your dog. A common rule of thumb is to choose a chew that is larger than your dog’s mouth, so the whole toy cannot be swallowed. If you are torn between two sizes, go with the bigger one.
How each chew material works
Natural and synthetic rubber
Rubber chew toys come in two basic builds. Natural rubber is made from latex sap and has a springy, slightly tacky feel. Synthetic rubber is manufactured from lab-made polymers and has a similar give without the natural latex proteins that cause allergies in some dogs. Both types compress when your dog bites down, which spreads the force across the tooth surface instead of pressing on a single point. That is why rubber toys are often recommended for puppies and senior dogs.
Rubber is not all one consistency. Some molded rubber toys feel squishy, while others have a firm, dense center with a softer outer layer. The exact blend changes how fast the toy wears and how much chewing force it can handle. Dense rubber resists punctures well, while hollow rubber toys can tear if a dog bites aggressively. Read the material description and the manufacturer’s guidance for your dog’s size.
Nylon
Nylon chews are molded into smooth bones, rings, and textured shapes from a hard plastic-like polymer. They do not compress under a bite. Instead, they use stiffness to stand up to repeated gnawing, which makes them convenient for dogs that finish off softer materials quickly. Many nylon chews are designed to wear down gradually, and some have raised ridges or bristle-like textures that the manufacturer describes as helpful for cleaning teeth.
The trade-off is that a rigid surface can be unforgiving. A dog that bites with full force can crack a tooth on nylon, especially if the chew is too small and ends up between the molars. Nylon also tends to develop frayed or chipped edges over time, so you should inspect the toy regularly and take it away as soon as you feel any sharp roughness.
The fingernail test
One of the simplest ways to judge whether a chew is too hard is the fingernail test. Press your thumbnail firmly into the surface of the toy. If the material dents under your nail, it gives when your dog bites and is generally considered gentler on teeth. Rubber usually leaves a dent. If your nail slides over the surface and leaves little or no mark, the chew is rigid and behaves like nylon, so you should be cautious about giving it to a dog that bites with a lot of force.
Side-by-side comparison table
The table below summarizes how each chew material and puzzle style compares on hardness, durability, cleaning needs, and the type of chewer it suits.
| Option | Hardness and tooth safety | Durability | Cleaning | Best for |
|---|---|---|---|---|
| Natural rubber | Gives under pressure; the fingernail test leaves a dent; gentle on teeth and gums. | Moderate; dense versions resist tearing, but aggressive bites can damage hollow shapes. | Wash by hand with warm soapy water; many solid pieces are dishwasher-safe, so check the manufacturer. | Puppies, seniors, and dogs that like a flexing chew. |
| Synthetic rubber | Similar give without natural latex; tooth-friendly texture. | Varies widely by density; firmer blends hold up to hard chewing. | Same as natural rubber; rinse and dry thoroughly after washing. | Dogs sensitive to latex proteins and dogs that need a softer chew. |
| Nylon | Rigid; the fingernail test leaves little or no mark; can be tough on teeth if a dog bites with full force. | High for strong chewers, but the toy develops rough edges over time. | Hand wash with soap and water; avoid high heat unless the manufacturer says otherwise. | Power chewers that have not cracked teeth on hard materials. |
| Slider puzzle | Plastic frame with sliding panels; not a chew toy, so ingesting parts is the main risk. | Depends on build quality; a determined chewer can pry off panels. | Wipe down and wash removable parts according to the manufacturer. | Problem-solving dogs that enjoy nosing and pawing. |
| Snuffle mat | Soft fabric; no hardness; the risk is swallowing fabric rather than tooth damage. | Low against chewing; supervise and remove the mat if fabric begins to pull loose. | Machine wash and air dry if the label allows; otherwise hand wash. | Sniffers, nervous eaters, and dogs that need slower meals. |
| Dispensing ball | Round surface made of rubber or plastic; hardness depends on the material; the openings can be chewed at. | Moderate; rubber versions survive play well, while some plastic shells crack if chewed hard. | Rinse the inside and scrub the openings; many are dishwasher-safe, so check the manufacturer. | Active dogs that like rolling, chasing, and working for food. |
When rubber is the better choice
Rubber is a better choice when your dog is young, elderly, or prone to chewing furniture, because the material dulls the impact of the bite. Puppies are still losing and growing teeth, so a flexing rubber surface is much easier on their gums. Senior dogs with worn teeth also benefit from a chew that does not add extra pressure to sensitive areas. If your dog has dental disease or you are worried about their teeth, ask your veterinarian before introducing any new chew.
Rubber also suits dogs that like to gnaw for long stretches in one position. A hollow rubber toy can be stuffed with a treat or a smearable spread, turning the chew into an activity that requires licking, rolling, and squeezing. That makes it a hybrid between a chew toy and a puzzle toy, and it works well for dogs that get bored quickly.
When nylon is the better choice
Nylon is a better choice for a dog that tears rubber toys apart in a single sitting. The hard surface takes longer to show damage, so it is a practical option for strong chewers who would otherwise go through a steady supply of softer toys. If you already know your dog has healthy teeth and has handled hard materials without problems, nylon may match their style better.
Even with a strong chewer, you should supervise the first few sessions. Watch how your dog positions the chew and whether they seem to be biting down on the tip versus the side of the toy. Nylon wears down in small flakes or chips, not clean shavings, so check the surface after each use. If you see pieces coming loose or feel a sharp edge, retire the toy.
Puzzle toy designs compared
The other major choice is not about hardness but about how the toy delivers food. Sliders, snuffle mats, and dispensing balls all challenge a dog’s brain rather than their jaw. Choosing among them depends on your dog’s energy level, mouth habits, and how easy you need cleanup to be.
Sliders
Slider puzzles use a flat tray with compartments and a sliding panel that a dog noses or paws away to reveal a treat. They work well for dogs that like to push, nudge, and solve spatial problems. Because the pieces are usually made of rigid plastic, this is not a toy for a dog that treats everything as a chew. If your dog mouths the panel, supervise closely and remove the puzzle if any piece starts to loosen.
Snuffle mats
Snuffle mats are made of loops of fabric attached to a base. You hide pieces of food between the strips, and your dog sniffs them out. This taps into natural foraging behavior and can slow down a dog that eats too quickly. The mat is soft, so it is tooth-friendly, but it is also tempting for a dog to bite and shake. Redirect the dog to sniffing, and if the fabric begins to pull away, put the mat away until the next supervised session.
Dispensing balls
Dispensing balls are hollow balls with openings that release small pieces of food when the ball rolls and bounces. They are great for active dogs that like to chase before they eat. The material makes a difference: rubber balls are gentler on floors and teeth, while rigid plastic balls tend to roll faster but can be chewed apart by a determined dog. Choose an opening size that lets food fall out without jamming, and follow the manufacturer’s instructions for the right food size.
Upkeep and long-term ownership
Rubber retains the smell of food and drool quickly, so it benefits from regular washing. Wash rubber by hand with warm water and dish soap, or run it through the dishwasher if the manufacturer says it is safe. Dry it completely, especially the inside of hollow toys, so moisture does not hide in the crevices.
Nylon needs less frequent washing, but it should still be wiped clean. Hand-wash nylon with soap and water and let it air dry. Nylon can develop fine scratch marks where bacteria can settle, so a smooth toy is easier to keep clean than one with deep texture. Puzzle toys have different parts with different needs, so follow the manufacturer’s cleaning instructions for each component.
Every chew and puzzle toy has a limited useful life. Rubber develops cracks or tears where a tooth catches, nylon develops fraying or sharp chips, and puzzle toys can shed small pieces. Before every use, inspect the toy closely. When you see a piece ready to come off, throw the toy away, because loose pieces are a choking and swallowing hazard. If your dog swallows a piece of any toy, contact your veterinarian right away.
FAQ
Is the fingernail test a reliable way to judge chew hardness?
It is a widely used rule of thumb. Press your thumbnail into the toy; if it dents, the chew gives under pressure and is generally gentler on teeth. If it does not dent, the material is rigid, so be cautious with strong bite forces. Watch your dog’s behavior and ask your veterinarian if you are unsure about a specific chew.
Can rubber or nylon chews crack a dog’s tooth?
Any hard chew, including some rubber blends and most nylon, can damage teeth if a dog bites with extreme force. The fingernail test helps identify rigid material, and choosing a size that fits properly reduces the risk. If you suspect a cracked tooth or unusual chewing behavior, contact your veterinarian for advice.
How do I clean a rubber or nylon chew safely?
Wash rubber with warm soapy water and dry it thoroughly; many rubber pieces can go in the dishwasher, but check the manufacturer first. Nylon should be hand-washed and air dried. For puzzle toys, clean each part according to the manufacturer’s instructions to avoid warping or damaging moving pieces.
Which puzzle toy is best for a dog that chews everything?
A dispensing ball made of dense rubber is usually the toughest puzzle option, but a determined chewer can still damage it. Sliders and snuffle mats are not chew toys and should be used only under supervision. If your dog chews toys apart, offer a hard rubber chew instead and save puzzle designs for short, supervised sessions.
Both rubber and nylon have a place in a dog toy collection, and the best choice often changes as your dog ages and their chewing habits evolve. Start with the fingernail test, pick a size that cannot be swallowed, and let your dog’s behavior guide you. For more side-by-side looks at other categories, see the pet toy comparisons and the broader pet product comparisons.
About Graham Fisher
Graham Fisher is part of our editorial team and reviews and edits our everyday pet gear guides, checking product details against manufacturer specifications and owner feedback.
