A tennis ball looks like the perfect dog toy: cheap, bouncy and always on hand. Veterinary and animal-welfare sources raise two separate concerns, though. Veterinary dental guidance warns that the fuzzy cover may contribute to tooth wear, particularly when dirt or sand is embedded in it, and a ball that is crushed or broken can lodge in the throat or the gut. This guide summarizes what those sources say, where they agree, and what nobody has measured.
Quick answer
Supervised fetch is a more cautious way to use a tennis ball than letting a dog chew one for long periods, but it does not remove the risks of ball damage, choking or swallowed material. The sources we read particularly warn about dogs that chew, crush or shred balls, and large dogs with powerful jaws. We found no controlled study that measures how much tooth wear a tennis ball causes, so the dental concern rests on specialist and clinic statements rather than trial data.
What the fuzz does to teeth
The American Kennel Club quotes Dr. Thomas Chamberlain, a board-certified veterinary dental specialist, saying that the fuzz is quite abrasive and that accumulated dirt and sand make it more so. The AKC article describes the fuzz as acting like sandpaper and gradually wearing teeth down in a process called blunting, which it says can eventually lead to problems such as exposed tooth pulp and difficulty chewing. The Irish charity Blue Cross makes the same point in its own words, saying the surface acts like fine sandpaper and can wear down the protective enamel. East Valley Animal Hospital says that excessive chewing on tennis balls puts a dog at risk for dental problems later.
These statements agree, but they are not independent confirmation. A Mental Floss article repeats the AKC quote, and the other sources give general warnings without measurements. Dental wear from chewing a rough surface is plausible, but we could not find data on how quickly it happens or how much play it takes.
Choking and blockage
The same sources describe a second risk. The AKC says dogs with powerful jaws can easily break tennis balls and that half a ball can lodge in the back of the throat and block the airway. East Valley Animal Hospital says a ball can be squeezed smaller in the mouth, swallowed and then return to its full shape in the throat. Blue Cross calls a ball lodged in the throat a veterinary emergency, notes that balls can break apart under strong jaws, and says gut blockages often need emergency surgery. Blue Cross goes further for large dogs, saying it would strongly advise against using tennis balls for them at all.
Swallowed fuzz is a smaller version of the same problem. The AKC says eating the fuzz can create choking hazards and intestinal blockages that could require surgery. If your dog has swallowed part of a ball, see what to do if a dog swallows a piece of a toy.
Fetch is not the same as chewing
The AKC says dogs that chew on their balls are most at risk for choking and dental wear, and recommends that dogs only have access to tennis balls during supervised play. It also relays advice from a veterinarian writing for VetStreet to keep several balls for fetch but not let a dog hold more than one at a time. Mental Floss reports that the Humane Society advises throwing away any ball that starts to deteriorate. A dog that carries a ball back and drops it is in a different situation from one that settles down to flatten it.
What to use instead
The AKC suggests a rubber ball, especially one designed for powerful chewers, as a tennis ball substitute. Blue Cross recommends toys and balls made specifically for dogs, rubber toys described as durable and gentle on teeth, and dental chew toys. Two cautions apply. A rubber toy is not automatically safe: VCA Animal Hospitals warns that very hard items can chip or fracture teeth and advises against toys small enough to fit entirely in the dog’s mouth. And no source we read shows that any particular ball is safe for a determined chewer. Our guides to rubber toys for aggressive chewers, chew toy size and hard chews and teeth explain how to weigh those trade-offs.
Who should be most careful
- Dogs that chew, crush or shred balls instead of retrieving them.
- Large dogs with strong jaws. East Valley Animal Hospital notes that tennis balls fit easily in larger dogs’ mouths, and Blue Cross says large dogs are particularly at risk.
- Dogs with existing dental problems. Ask your veterinarian before choosing any ball or chew.
What we cannot tell you
- How much enamel wear a typical fetch routine causes. We found no study that measures it.
- Whether the dental risk is meaningfully larger than that of other hard toys.
- Which specific ball is safe for your dog.
How we evaluated this guide
This guide is research-based and does not provide veterinary advice. GetDogVerdict did not physically evaluate any ball. It summarizes the American Kennel Club (updated February 2022), Blue Cross (Ireland), East Valley Animal Hospital and Mental Floss, with VCA Animal Hospitals for general toy-safety checks. The dental statements trace mainly to one board-certified veterinary dental specialist quoted by the AKC and are echoed, not independently measured, by the other sources. We did not review a controlled study. Evidence Confidence is MEDIUM for the choking and blockage warnings and LOW for how much tooth wear to expect. This page contains no affiliate links, because GetDogVerdict does not place them on safety pages. Last reviewed: October 15, 2026. Read more in How We Review and our Editorial Policy.
Bottom line
Treat a tennis ball as a fetch toy that needs supervision, not as a chew toy. If your dog chews or crushes balls, or is a large dog with strong jaws, pick a toy made for dogs and retire any ball that starts to break down. Related: are rope toys safe for dogs, when to replace a dog chew toy and the broader guide to dog toys for aggressive chewers.