Dog & cat health · Vet-reviewed guide

Cat Dental Disease: The Conditions, Signs, and Treatment

Cats are experts at hiding mouth pain, which is why dental disease is so common and so often missed until it's advanced. Here's what to watch for and why brushing isn't enough once it sets in.

Quick answer: Cat dental disease is the most common health problem in adult cats, and because cats hide mouth pain so well, it often goes unnoticed until it is advanced. It begins when plaque builds up along the gum line and inflames the gums, a stage called gingivitis, which can progress to periodontal disease that damages the tissue and bone holding the teeth.

If a vet prescribes an antibiotic: our licensed veterinarian can review your pet and, when appropriate, provide clindamycin for dogs & cats — the prescription is included at no separate cost, and you pay only for the medication.

Cats are also prone to a painful problem called tooth resorption, where the tooth structure breaks down, and to a severe immune-driven inflammation called stomatitis. The unifying theme is that established dental disease cannot be brushed or medicated away at home and is not cured by antibiotics; the core treatment is a professional dental cleaning under anesthesia, sometimes with extractions. The good news is that early gum inflammation is reversible, and consistent home care plus regular checkups prevent most of the damage. This guide is an overview of the conditions involved and where to go next.

Why dental disease matters in cats

By the age of three, most cats already have some degree of dental disease, and it tends to worsen silently because a cat will keep eating despite significant mouth pain.¹ Beyond the mouth, ongoing dental infection is uncomfortable and can affect overall health, which is why routine dental checks are part of good cat care.

The conditions under the umbrella

• Gingivitis. Inflammation of the gums from plaque. Reversible when caught early. See our guide on cat gingivitis.
• Periodontal disease. Advanced disease that damages the support around the teeth and often means extractions.²
• Tooth resorption. A common, painful feline condition where the tooth itself erodes; affected teeth usually need removal.
• Stomatitis. A severe, painful immune-driven inflammation of the whole mouth. See our guide on cat stomatitis.

Signs to watch for

Common signs are bad breath, red or bleeding gums, drooling, dropping food or chewing on one side, pawing at the mouth, and reluctance to eat hard food.¹ Because cats hide pain, bad breath is often the earliest clue an owner notices.

How it is treated

The foundation of treatment is a professional dental cleaning under anesthesia, which removes plaque and tartar above and below the gum line, along with dental X-rays to assess the roots and treatment or extraction of damaged teeth.² Antibiotics do not cure dental disease, because they do not remove the plaque and tartar that cause it, though a vet may use them in specific situations. Any prescribed medication comes through your vet. See how our vet prescription service works.

Prevention and home care

Most dental disease is preventable with consistent home care and regular checkups. Tooth brushing is the most effective home measure, supported by veterinary-approved dental products. See our guide on cat dental home care for what genuinely helps and what to avoid.¹

When to see a vet

Have your cat's mouth checked if you notice bad breath, red or bleeding gums, drooling, or any change in eating, and promptly if your cat is dropping food, losing weight, or clearly in pain.² Early evaluation keeps reversible problems from becoming painful, expensive ones.