KONG vs Nylabone: Rubber or Nylon for Your Dog?

KONG and Nylabone are the two chew toy brands most owners already have in the cupboard, and they solve the same problem with opposite materials. KONG molds its toys from natural rubber that squashes and springs back. Nylabone's core line is nylon that stays rigid and slowly roughens as a dog gnaws it. That single difference, soft-and-flexing versus hard-and-wearing, decides which one suits your dog far more than the logo does.

How this comparison was built: we did not run our own bite tests. Sizes, weight ranges, warnings and replacement rules below come from each brand's own product and usage pages as of September 2026, linked where they appear. Tooth and gut safety points come from VCA Animal Hospitals, the American Kennel Club and the ASPCA. Where the verdict is our judgement rather than a quoted fact, we say so.

Quick Verdict

• Pick KONG if you want a toy that passes the fingernail test, can be stuffed with food and frozen, and gives a little when your dog bites down hard. It is our default for most adult dogs, puppies and seniors.
• Pick Nylabone if your dog enjoys slow, grinding chewing on a bone shape and you can check the toy often for worn ends. Choose the chew strength line that matches your dog (Puppy, Flexi, Strong or Power Chew) instead of the toughest one by default.
• Skip hard nylon for dogs with worn, cracked or missing teeth and for any dog that has fractured a tooth before, because veterinary dentists advise against hard chews for them (details below).
• With either brand, a toy that your dog breaks pieces off is the wrong toy for that dog. Size up, change material, or take it away.

KONG and Nylabone Side by Side

The table compares the two brands on the points a buyer can actually check. Each cell paraphrases or quotes the linked maker page; the last row is our reading of the material, explained in the next section.

Price and availability change too often to be useful in a table, but both brands are sold in most pet stores and online, so the choice rarely comes down to access. For KONG compared with other rubber makers rather than nylon, our rubber dog toys comparison adds Goughnuts, Chuckit!, Ruffwear and Benebone's rubber line.

Hardness: The Difference That Matters Most

VCA Animal Hospitals gives a simple household check in its guide to choosing a chew toy: a toy should be soft enough that you can dent it with a fingernail, and a long toy should have a little give when you bend it between your hands. VCA lists bones, cow hooves, pig ears, hard rawhides and large ice cubes as examples of chews that are too hard and can chip or fracture teeth.

Nylon is named directly in VCA's article on puppy teething and chewing. It says most veterinary dentists recommend against letting puppies and older dogs chew anything hard, lists objects made of nylon alongside bones and antlers, and repeats the rule of thumb many dentists use: do not let your dog chew anything that won't bend. VCA's page on fractured teeth adds that the teeth broken most often are the canines and the large upper cheek teeth at the back of the mouth, and that hard, non-bending chew toys are one of the causes.

That does not make every Nylabone a bad choice. The brand's own chew style guide steers gentle chewers and senior dogs to its flexible Flexi Chew line, and its usage guidelines explain that the raised, bristle-like surface on a well-used nylon chew is part of how it is meant to clean teeth. The point is to match the hardness to the dog. A rubber KONG sits on the forgiving end of that scale; a Power Chew bone sits on the firm end.

Which Brand for Which Dog

These pairings are our judgement, built on the maker guidance and vet sources above.

Teething puppies

Both brands make puppy-specific lines and both put limits on them. The KONG Puppy uses a softer puppy rubber and carries the warning "not recommended for puppies over 9 months." Nylabone's Just for Puppies teething keys are described as not intended for powerful puppies or puppies with adult teeth. Either works during teething; the rubber one can also be filled and frozen, which the AKC suggests for sore gums. Our best chew toys for puppies guide walks through the whole teething timeline.

Average adult chewers

A red KONG Classic stuffed with part of dinner is hard to beat for a dog that chews steadily but does not destroy things. A Nylabone Strong Chew is a reasonable second toy for variety, as long as it passes your own bend and dent check.

Power chewers

KONG tells owners of power chewers to go up one or two sizes or move to the black Extreme formula. Nylabone points the same dogs to Power Chew. If your dog is the kind that removes chunks, look at our toughest toys for heavy chewers list, which adds Goughnuts rings with a built-in wear indicator.

Seniors and dogs with dental work

Choose rubber, or Nylabone's Flexi Chew, and avoid hard nylon. VCA's teething article singles out older dogs as a group that should not chew hard objects.

Dogs that swallow pieces

Neither brand is safe for a dog that eats its toys. The ASPCA's position statement on dog chews tells owners to avoid products their dog can consume in significant pieces and to call a veterinarian at once if a chunk is swallowed. Nylabone's guidelines say the same for a large swallowed piece.

Sizing Each Brand to Your Dog's Mouth

Weight charts are a starting point, not the answer. VCA's first rule is that a toy should never be small enough to fit entirely in your dog's mouth. Two dogs of the same weight can have very different jaws: a 30 lb bulldog-type dog has a wider bite than a 30 lb whippet. If your dog sits where two KONG Extreme sizes overlap (for example 30 to 35 lb, which is both Medium and Large), take the larger one. For Nylabone, which sells by weight band, move up a band for a dog with a broad head or a hard bite.

Check the size again as the toy wears. A rubber KONG stays roughly the same size until it tears, while a nylon bone gets shorter as the ends wear, which is why Nylabone's own rule includes replacing a chew that has become too small. For the full weight-by-size breakdown of every KONG line, see our KONG size chart for dogs.

When to Throw Each One Away

VCA's rule covers both materials: if rubber is broken or pieces are coming off, retire the toy so the broken bits are not swallowed, and take a toy away if your dog is chewing off chunks.

• KONG: bin it when you see a tear, a crack that opens when you squeeze the toy, or missing rubber around the openings. KONG's own label says to discontinue use if damaged.
• Nylabone: inspect before each session. Replace it if pieces are missing, if the ends have worn into a stub, or if the bone is now small enough to fit far into your dog's mouth, as Nylabone's guidelines state. Raised bristles on the surface are normal wear; chunks are not.

Choosing between materials in general, not just between these two brands? Our rubber vs plush vs rope comparison explains where each material fits in a toy box.

KONG vs Nylabone FAQ