Cat Teeth Problems: Loose Teeth, Grinding, and Teething

Name: Cat Teeth Problems: Loose Teeth, Grinding, and Teething
Creator: Dr. Zubair Khalid

By Dr. Zubair Khalid, DVM, MS, PhD · 2026-10-02

Loose teeth, grinding, and teething in cats can all point to cat teeth problems, but they do not mean the same thing. Teething is a normal stage in kittens, while a loose or missing tooth in an adult cat usually signals disease. This article is educational and is not a substitute for veterinary diagnosis or treatment.

Quick Answer

Kittens normally lose their baby teeth and grow adult teeth between about 4 and 7 months of age [1].
A loose or falling-out tooth in an adult cat is not normal and often means periodontal disease has destroyed the tissue holding the tooth [2].
Teeth grinding (bruxism) in cats is usually a sign of mouth pain, not a harmless habit.
Most cats have 26 baby teeth and 30 adult teeth, so counting can help you track what is normal [1].
Gum disease needs professional cleaning under anesthesia. Cleanings done without anesthesia do not treat plaque below the gum line [2].

What Cat Teeth Problems Look Like and What Is Normal

Normal teething in kittens

Kittens are born without visible teeth. The baby incisors start coming through at 2 to 4 weeks of age, and the baby premolars appear at 5 to 6 weeks [1]. These are the deciduous teeth, the same "baby teeth" concept you know from children.

Around 4 to 7 months, the adult teeth begin to push through and the baby teeth fall out [1]. Most cats end up with 26 baby teeth and 30 adult teeth [1]. During this window you may find a tiny tooth on the floor or in the bedding. That is expected.

Teething kittens may chew more, drool a little, or seem mildly uncomfortable. They may also have slightly pink gums where a tooth is erupting. These signs are usually mild and pass.

What is not normal

Once your cat is past about 7 months, losing a tooth is a warning sign, not a milestone. Adult teeth should stay put for life unless disease or trauma loosens them.

Watch for these signs of cat teeth issues:

A tooth that moves when you gently touch it
A tooth that has fallen out on its own
Grinding or clicking sounds when your cat eats
Drooling, especially drool tinged with blood
Chewing on one side of the mouth or dropping food
Bad breath that does not improve
Pawing at the mouth or flinching when the face is touched
Eating less, losing weight, or grooming less

That last point matters more than many owners realize. Cats in mouth pain often stop grooming before they stop eating. If your cat's coat looks dull or greasy, dental pain may be part of the picture. You can read more about that link in Why Is My Cat grooming less than normal? Obesity Dental Pain and Depression.

Main Causes of Cat Teeth Problems

Cause	Typical clues	How urgent
Teething (kittens 4 to 7 months)	Loose baby teeth, mild chewing, tiny teeth found around the house	Routine, mention at next visit
Periodontal disease	Loose teeth, bad breath, red gums, tartar, dropping food	See a vet soon, within days to weeks
Tooth resorption	Grinding, pain when eating, tooth looks worn or has a pink spot	See a vet soon, this is painful
Chronic gingivostomatitis	Severe mouth pain, drooling, refusing food, red inflamed gums	See a vet promptly, same week
Trauma (fall, bite, chewing something hard)	Sudden loose or broken tooth, bleeding, swelling	Same day
Oral mass or tumor	Firm lump, one-sided swelling, foul odor, weight loss	Same day to same week

Periodontal disease

Gum (periodontal) disease is infection and inflammation of the tissue around the teeth. It happens when bacteria build up as plaque at and below the gum line, largely because of a lack of proper oral hygiene [2]. The infection inflames the gums, the ligaments that anchor the teeth, and the surrounding bone [2]. When those supporting tissues are destroyed, teeth loosen and fall out [2].

There are two forms: gingivitis and periodontitis [2]. Gingivitis is the earlier, reversible stage. Periodontitis involves deeper tissue and bone loss and does not reverse on its own.

Dental disease is not rare. Oral diseases affect up to 90% of older cats, and periodontal disease, chronic gingivostomatitis, and tooth resorption are the main conditions seen [3].

Tooth resorption

Tooth resorption is a common and painful dental disease in cats [4]. The tooth structure is broken down and eroded from the inside or outside, which is why it is sometimes called a "cat teeth lesion." Affected teeth often look abnormal, and the problem is confirmed with dental radiographs.

A 2026 review of 166 cats with radiographically confirmed tooth resorption found that brachycephalic cats (flat-faced breeds) were significantly younger than other cats when affected (7.1 versus 8.7 years) and had a higher rate of advanced Stage 4 lesions [4]. Chronic gingivostomatitis was more common in non-brachycephalic cats [4]. This suggests flat-faced cats may need earlier dental screening.

Chronic gingivostomatitis

This is severe, widespread inflammation of the mouth. Cats with it often have intense pain, drool, and resist eating. It is one of the principal oral diseases in cats, along with periodontal disease and tooth resorption [3].

Teeth grinding

Bruxism, or grinding the teeth, is not a normal cat behavior. In most cases it reflects oral pain, including pain from tooth resorption or periodontal disease. Some cats grind when their jaw or mouth hurts, and the sound is often described as a clicking or crunching noise during chewing or at rest.

Diet and oral health

Diet may play a role in oral health. In a 28-week study, cats fed a dry diet had lower tooth calculus coverage and thickness than cats fed a wet diet, and gingivitis scores were higher in the wet-diet group [5]. This does not mean dry food replaces brushing. It does mean diet is one factor among several.

Red Flags That Make It an Emergency

Call your veterinarian right away or go to an emergency clinic if you see:

Bleeding from the mouth that does not stop
A swollen face or jaw, especially with fever or lethargy
A tooth that is hanging by tissue or a visibly broken tooth with exposed pulp
Your cat cannot close its mouth or is holding it open
Drooling with inability to swallow
Refusing all food and water for more than 24 hours
Breathing that sounds noisy or strained
A sudden foul smell with a firm lump in the mouth

Mouth pain can also cause cats to stop eating and drinking, which leads to dehydration. Cats that are unable or unwilling to eat and drink may need intravenous fluids or a feeding tube to prevent dehydration [6]. That is a hospital-level problem, not a wait-and-see problem.

Safe Things You Can Do at Home While You Wait

You cannot fix a loose tooth at home, and you should never pull a cat's tooth yourself. What you can do is reduce discomfort and protect the mouth until your appointment.

Feed soft food. Moist food is easier on sore gums. If your cat is on a prescription diet, ask your vet before switching.
Warm the food slightly to boost the smell, which helps a cat with a reduced appetite.
Offer small, frequent meals instead of one large bowl.
Keep the water bowl fresh and place it where your cat rests.
Do not give human pain relievers. Many common human medications are toxic to cats. Your veterinarian will calculate any pain medication dose from your cat's weight and health.
Do not poke or wiggle the loose tooth repeatedly. A gentle look is fine. Repeated probing causes pain and can dislodge a tooth.
Skip hard chews, bones, antlers, and ice while the mouth is sore.
If your cat will tolerate it, wipe the outside of the teeth with a soft gauze pad moistened with water or a veterinary oral wipe. Do not force it if it hurts.

If your cat is already used to tooth brushing, pause the brushing until the mouth is evaluated. Brushing over inflamed gums hurts.

What Your Veterinarian Will Check and Test

The oral exam

Your vet will look at every tooth, the gums, the tongue, the palate, and the back of the throat. They will check for pockets around the teeth, tartar, missing teeth, and retained roots. They will also feel under the jaw and along the neck for swollen lymph nodes.

Dental radiographs

X-rays are the only way to see what is happening below the gum line. Tooth resorption is confirmed radiographically [4]. Radiographs also reveal root remnants, bone loss, and teeth that look fine on the surface but are diseased underneath.

Blood work

Blood tests check organ function before anesthesia and screen for conditions that can affect the mouth. Cats that do not respond to gum treatment should be evaluated for other diseases, including immune system problems, diabetes, and feline Bartonella infection (cat scratch fever) [2].

Professional cleaning under anesthesia

Treatment for gingivitis and periodontitis includes a professional dental cleaning by your veterinarian, which requires anesthesia [2]. This includes cleaning below the gum line [2]. Treatments performed without anesthesia may make the tooth look better but do not treat the underlying problem of plaque below the gum line [2].

After cleaning, your veterinarian may apply a sealant to the teeth to prevent bacterial buildup and improve healing [2]. Gingivitis will come back if the teeth are not kept clean and free of plaque [2].

Extractions when needed

For severe inflammation that does not respond to cleaning, surgical removal of the premolars and molars plus the connective tissue attaching teeth to the jaw bone is the only treatment that has provided improvement and long-term control [6]. Some cats need full-mouth extractions [6].

If teeth are extracted early in the disease process, the procedure generally results in significant improvement or complete resolution of inflammation in 60% to 80% of cats [6]. When extractions are delayed, the response to surgery is not good [6].

Extracting all or most of the teeth is not as bad as it sounds. Cats eat well without their teeth [6]. Antibiotics are given if bacterial infections are present, and dietary changes, pain medications, and antiseptic mouthwashes may help lessen signs [6].

Why treating the mouth matters beyond the mouth

Oral disease does not always stay in the mouth. A case report described a 5-year-old cat with a 2-year history of small-bowel diarrhea, reduced appetite, and a poor coat. Dental exam and radiography found missing teeth, a root remnant, stage 4 periodontal disease, and tooth resorption. After multiple extractions and pain control, the cat's appetite, body condition, energy, and coat quality improved [7].

That is one case, not proof that dental disease causes diarrhea in every cat. It does show why your vet may look at the mouth when the gut is the complaint.

Prevention and Monitoring

Start early and stay consistent

The single best home habit is daily plaque control. Plaque is the root of the problem, and it builds up fast [2].

Brush your cat's teeth with a cat-safe toothbrush and veterinary toothpaste. Never use human toothpaste.
If brushing is not possible, ask your vet about dental wipes, gels, or water additives.
Feed a diet your vet recommends for oral health. Dry food was linked to less calculus and lower gingivitis scores than wet food in one study, but it is not a substitute for cleaning [5].
Schedule professional dental cleanings as your vet advises. Frequency depends on your cat's individual disease risk.
Check the mouth at home once a week. Lift the lip, look at the back teeth, and note any redness, tartar, or bad smell.

For a broader plan, see Prevent Dental Problems In Cats and How To Prevent Dental Problems In Cats.

Know your cat's risk profile

Flat-faced cats may develop advanced tooth resorption at a younger age, so early screening is reasonable for those breeds [4]. Older cats carry the highest burden of oral disease overall, with up to 90% affected [3].

Watch the whole cat, not just the mouth

Weight loss, poor coat, reduced grooming, hiding, and grumpy behavior can all be pain signals. If your cat's personality or habits change, ask for a dental exam. You can also review Dental Disease In Dogs And Cats for how oral disease shows up across species.

Limitations and When to Contact a Veterinarian

No article can tell you whether your cat's specific tooth is diseased. Only an exam and radiographs can do that. Individual cases need a veterinarian who can see your cat, feel the mouth, and read the X-rays.

Use this timing guide:

Emergency now: uncontrolled bleeding, facial swelling with lethargy, a hanging tooth, inability to swallow, trouble breathing, or no food or water for 24 hours.
Same day: a tooth knocked loose by trauma, a broken tooth with a visible pink or red center, sudden heavy drooling, or a new lump in the mouth.
Within a few days: a loose adult tooth, teeth grinding, dropping food, or one-sided chewing.
Routine visit: a kitten in the 4 to 7 month teething window with mild signs, or an adult cat with tartar and bad breath but normal eating.

If you are unsure which category fits, call your vet's office and describe what you see. Front desk staff can help you decide whether to come in now or book a regular appointment.

Frequently Asked Questions

Is it normal for a cat to lose teeth?

It is normal only for kittens losing baby teeth during the teething window. In adult cats, tooth loss is a sign of disease, most often periodontal disease that has destroyed the supporting tissues. A lost adult tooth means you should book a dental exam.

Why is my cat grinding its teeth?

Teeth grinding in cats usually signals mouth pain, such as tooth resorption or gum disease. It is not a harmless quirk. Have your cat examined so the source of pain can be found and treated.

What are the signs of teething in kittens?

Kittens teethe starting around 2 to 4 weeks for baby teeth and again around 4 to 7 months for adult teeth. You may see mild chewing, drooling, and tiny teeth around the house. Severe pain, refusal to eat, or a retained baby tooth that will not fall out needs a vet visit.

Can a loose tooth in a cat fix itself?

No. Once the ligaments and bone holding a tooth are damaged, they do not regrow. The tooth either needs professional treatment or extraction. Waiting usually makes the disease worse and makes surgery less successful.

What are cat teeth lesions?

The term usually refers to tooth resorption, where tooth structure is broken down and eroded. These lesions are painful and are confirmed with dental X-rays. Treatment typically involves extraction of the affected tooth.

How can I tell if my cat's mouth hurts?

Watch for dropping food, chewing on one side, drooling, bad breath, pawing at the mouth, and flinching when you touch the face. Reduced grooming, hiding, and eating less are also common. Any of these signs deserves a dental exam.

References

Dental Development of Cats - Cat Owners. Merck Veterinary Manual.
Dental Disorders of Cats - Cat Owners. Merck Veterinary Manual.
Alterations in the feline oral microbiome in common oral diseases - A comprehensive review. European journal of microbiology & immunology, 2026.
Association of Skull Type, Diet, and Chronic Gingivostomatitis with Tooth Resorption in Cats Receiving Dental Treatment. Animals : an open access journal from MDPI, 2026.
Oral health indices and microbiota populations of adult cats consuming wet or dry diets. Frontiers in veterinary science, 2025.
Disorders of the Mouth in Cats - Cat Owners. Merck Veterinary Manual.
Resolution of Chronic Diarrhoea Following Treatment of Periodontal Disease in a Cat. Animals : an open access journal from MDPI, 2026.