Quick answer: Nylabones are marketed as indestructible chew toys, but vets increasingly raise two specific concerns: hard nylon shards can splinter off under heavy chewing and cause intestinal obstructions, and the sustained pressure puts dogs at risk of slab fractures on their back molars. For dogs that chew hard enough to break down the nylon surface, a collagen chew that softens with saliva (and therefore cannot fracture teeth or produce hard shards) is the safer long-term choice. Our pick is Fangz, a 3-ingredient Australian collagen chew air-dried to last hours at minimum per session, with a single chew often lasting days to weeks depending on how hard your dog goes at it.
The short answer is: it depends on how your dog chews
Nylabones are not immediately toxic. They do not contain harmful chemicals, and for a light-to-moderate chewer who mouths the toy without breaking the surface, the risk is low.
The problem is power chewers. If your dog actually reduces the nylon surface, two things can happen: shards of nylon break off and get swallowed, and the sustained gnawing force is enough to crack teeth. Both outcomes are documented in vet literature. Both are avoidable with a different chew.
What are Nylabones actually made of?
Nylabones are made from hard nylon polymer. Some variants are flavoured with real ingredients (chicken, bacon, peanut butter); the core material is always nylon plastic.
The product line splits into two categories:
- Chew toys: Hard nylon, not intended to be consumed. These are the ones that carry the fracture and shard risk.
- Edible chews: Softer, digestible alternative (sometimes marketed as "Nutri Dent" or similar). These behave more like a traditional chew treat and carry lower mechanical risk.
Most of the safety questions people ask refer to the hard nylon chew toys, not the edible line. That distinction matters.
The fracture risk: what vets actually see
Slab fractures, where a chunk of the tooth crown shears off under pressure, are one of the most common dental injuries vets treat in dogs. Hard chew substrates are the primary cause.
The Veterinary Oral Health Council (VOHC) and multiple veterinary dental organisations use the "thumbnail rule" as a practical guide: if you press the chew firmly against your thumbnail and it does not give at all, it is too hard. Hard nylon fails this test immediately.
The physics are straightforward. A dog's carnassial teeth (the large upper fourth premolars) generate substantial biting forces, which vary significantly by breed and jaw structure. When that force is applied against a substrate that cannot compress or yield, the tooth is the thing that gives. Nylon does not soften. It does not absorb pressure. It transfers that force directly to the tooth.
Compare that to a collagen chew, which gradually softens as the dog works on it. The yield is in the chew, not the tooth. That is the entire safety case for choosing collagen over hard nylon (or yak chews, or antlers, which share the same rigid-substrate problem). For a full breakdown of how chew hardness drives fracture risk, see our guide on whether dog chews can break teeth.
The shard problem: when nylon gets swallowed
Hard nylon does not digest. It cannot break down in a dog's stomach or intestine. When a dog shreds off pieces, those pieces travel through the gut as foreign bodies.
Small shards may pass without incident. Larger pieces, or pieces with sharp edges, can lodge in the oesophagus, stomach, or intestine and cause partial or complete obstruction. Obstruction is a surgical emergency.
You will know if your Nylabone is being actively destroyed: the surface develops visible grooves and divots, pieces come off when you press, and you may find fragments in your dog's faeces. If any of that is happening, the chew toy is the wrong product for your dog and should be retired immediately.
The manufacturer states that Nylabones are not intended for dogs that chew aggressively enough to break off pieces. That is a real caveat, and it matters more than most product pages make it sound.
How does Nylabone compare to other chews?
Here is a clear comparison across the chews that come up most often for power chewers:
| Chew type | Duration | Tooth-safe? | Digestible? | Ingredients | Price-per-chew session |
|---|---|---|---|---|---|
| Fangz collagen chew | Hours per session; one chew lasts days to weeks | Yes, softens with saliva | Yes, fully digestible | 3 (beef collagen, beef gelatine, one superfood) | Mid-range; high value per hour |
| Nylabone (hard nylon) | Weeks to months (not consumed) | Risk for power chewers | No, not digestible | Nylon + flavouring | Low purchase cost; vet bill risk |
| Yak chew | Hours | Risk for power chewers (pressure-cured, rock-hard) | Mostly | Yak milk, cow milk, lime juice, salt | Mid-range |
| Deer antler | Days to weeks | High risk (naturally dense, never softens) | No | Antler (calcium, marrow) | Mid to high |
| Bully stick | 20 to 60 minutes (typical) | Relatively safe (softer) | Yes | 100% beef pizzle | Low to mid; low value per hour |
| Rawhide | Variable | Moderate risk | Poor; chemical processing concern | Chemically processed cattle hide | Low; safety trade-offs significant |
The table is honest about duration. Collagen chews and hard nylon serve different purposes: nylon is not consumed, so it lasts longer in the house. The relevant comparison is risk, not longevity. A Nylabone sitting on the shelf for six months is not a concern. A Nylabone actively being shredded by a Staffy is.
Which dogs are highest risk with Nylabones?
Not every dog who chews a Nylabone will fracture a tooth or swallow a shard. The risk concentrates in specific chewing profiles:
High-risk dogs:
- Power chewers (Staffies, Rottweilers, Mastiffs, German Shepherds, Malinois, Huskies) whose bite force and chewing drive is high enough to break down the surface
- Young dogs, whose instinct to chew is at peak intensity
- Dogs left unsupervised for long periods with a Nylabone (you cannot monitor for shard generation)
Lower-risk dogs:
- Gentle chewers who mouth the toy without reducing the surface
- Small breeds with lower bite force
- Dogs who quickly lose interest
If your dog is in the high-risk group, a hard nylon chew is not the right product. The manufacturer acknowledges this. Redirecting to a digestible, yield-able chew is the straightforward fix. Visit the Fangz Build Your Pack page to pick the right size for your dog, or see best dog chews for aggressive and power chewers for breed-specific guidance.
What about the edible Nylabone range?
The edible variants (Nutri Dent and similar) are a different product. They are designed to be consumed, are softer, and break down in the gut.
The concerns here shift from fracture/shard risk to ingredient composition. Many edible Nylabones lead with grain-based fillers such as wheat starch and soy flour (as printed on the pack). They are not a clean-label product.
If you want a digestible chew for your dog, there are better options on the ingredient front. A collagen chew with three auditable ingredients (and nothing you need a chemistry degree to read) is a cleaner choice for daily use.
The Fangz position: what makes collagen different
Our chews are air-dried slowly, over about two to four weeks. That process creates a density that keeps power chewers busy for hours per session, and a single chew often lasts days to weeks depending on how hard your dog goes at it. The chew never becomes rigid in the way that hard nylon or yak milk is rigid.
The key mechanism: collagen softens under saliva as the dog works on it. The chew yields as the dog's teeth apply force. The teeth do not.
Three ingredients per flavour. Beef collagen and beef gelatine as the base, one superfood powder to distinguish each variant: pumpkin (tummy-friendly, supports digestion), beetroot for iron and folate, spirulina for plant-based protein and greens, or goat's milk for a milder and creamier option.
About 93% protein. About 1% fat. No artificial crap. Odourless. Puppy-safe from 4 months. Ships from Brisbane Australia-wide.
The honest hedge: Fangz is not the cheapest option on the shelf, and it does get consumed, so it does not last as long in the house as a nylon toy. That said, a single chew lasts hours at minimum per session, and most dogs stretch one chew across multiple days to weeks depending on how intensely they chew each sit-down. If your dog is a gentle mouther who treats a Nylabone as a toy rather than a chew target, a nylon toy might suit them fine. But if they are actively chewing, build a Fangz pack and see the difference.
For more on how collagen chews compare to other common options, see yak chew vs collagen chew and our complete guide to collagen for dogs.
The practical test: is your Nylabone still safe?
If you are already using a Nylabone, run this check now:
- Thumbnail test: Press the chew firmly against your thumbnail. If it does not indent slightly, it is too hard for unsupervised use with a heavy chewer.
- Surface check: Look for visible gouging, grooves, or loose pieces. If the surface is actively being reduced, retire the chew.
- Faeces check: If you are finding nylon fragments in your dog's stools, the chew is being ingested. Stop use.
- Shard check after each session: Inspect the chew and the surrounding area for broken-off pieces.
If any of those checks flag, the safest move is to replace the hard nylon chew with a collagen alternative.
Ready to switch?
Build your Fangz pack and see whether your dog actually settles for hours per session, then keeps coming back to the same chew over days to weeks. If they do not love it, we refund you. Three sizes (small for dogs under 8kg, medium for 8 to 15kg, large for over 15kg), four flavours. Made by Helen and John in Brisbane.
Sources
- Veterinary Oral Health Council (VOHC), vohc.org: accepted dental chew standards and the "thumbnail nail test" guideline for chew hardness
- American Veterinary Dental College (AVDC): recommendations on chew safety and slab fracture prevention (avdc.org)
- PMC 2023 study: "Long-Lasting Chews Elicit Positive Emotional States in Dogs during Short Periods of Social Isolation," PubMed Central, pubmed.ncbi.nlm.nih.gov