cat losing teeth: What’s Normal and When to See a Vet
You find a tiny tooth on the floor and immediately start searching your cat’s mouth trying to figure out what happened. The good news is that cat losing teeth is sometimes a perfectly normal developmental event — and sometimes a sign of a dental problem that needs attention. Knowing which situation you’re dealing with changes everything.
Kittens go through a teething phase just like human children do, and cats teeth falling out during this stage is expected. Adult cats are different. If you’re seeing cat teeth falling out in an adult animal, or you notice a cat missing teeth that weren’t missing before, that’s worth investigating. Cats losing teeth as adults almost always has a cause — and most causes are treatable if caught early.
Kitten Teething: Normal Tooth Loss in Young Cats
Kittens are born without teeth. Their baby teeth — also called deciduous or milk teeth — start coming in around 2–3 weeks of age. By 6–8 weeks, a kitten has a full set of 26 deciduous teeth. These start falling out between 11 and 30 weeks as the permanent adult teeth push through. Most owners never find the baby teeth because kittens often swallow them — this is harmless. By around 6 months of age, a healthy cat should have all 30 permanent teeth in place.
Common Causes of Tooth Loss in Adult Cats
Adult tooth loss is not normal. The most common causes are periodontal disease, tooth resorption, and trauma. Periodontal disease — infection and inflammation of the structures supporting the teeth — is extremely common in cats over age 3. As the gum tissue and bone around the root deteriorate, teeth become loose and eventually fall out. Bad breath, red gum lines, and pawing at the mouth are signs that periodontal disease may be present.
Tooth resorption is a painful condition where the tooth structure breaks down from the inside out. It affects up to 75% of cats at some point in their lives. Affected teeth often appear normal externally but are fragile internally. They may break off at the gumline. Your vet can detect resorptive lesions with dental X-rays. Treatment is extraction of the affected tooth.
Trauma — from a fall, a collision, or rough play — can crack or knock out teeth. An adult cat who suddenly has a broken or missing tooth with no history of dental disease may have experienced an injury.
What to Do When You Notice a Missing Tooth
Schedule a dental exam with your vet. Bring the tooth if you found it — your vet may want to see it. During the exam, your vet will probe around all the teeth, assess gum health, and may recommend dental X-rays to evaluate the roots and bone below the gumline. Dental disease is frequently more extensive below the surface than visible examination reveals.
If periodontal disease is diagnosed, a professional dental cleaning under anesthesia is typically the first step. This allows the vet to scale tartar from below the gumline where a toothbrush can’t reach, and to extract teeth that are no longer viable. After the procedure, follow-up home care — brushing your cat’s teeth or using dental wipes and water additives — slows the progression of future disease.
Bottom Line
Tooth loss in kittens under 6 months is normal teething. Tooth loss in adult cats always has an underlying cause — most often periodontal disease or resorption — and warrants a veterinary dental exam. Catching dental problems early means less pain for your cat and less extensive (and expensive) treatment for you.
