Feline Dental Disease: Signs, Prevention, and When to Act

By age three, approximately 70% of cats show signs of dental disease — making it the most common health problem in feline medicine. Yet it's one of the most underdiagnosed conditions, because cats are masters at hiding oral pain.

Unlike dogs, cats rarely stop eating even with severe dental pain. They may switch to swallowing food whole, favour one side of the mouth, or eat more slowly — but outright food refusal often only happens at the most advanced stages.

"I've extracted teeth with exposed nerve roots from cats whose owners said they were 'eating fine.' Cats don't stop eating when it hurts — they just eat differently. We have to look for subtler signs." — Dr. Sarah Chen, DVM

Understanding how cats mask pain is crucial — our pain recognition guide covers the behavioural clues that reveal hidden discomfort.

1. Periodontal Disease (Most Common)

Plaque buildup leads to gingivitis (gum inflammation), which progresses to periodontitis (destruction of the structures supporting the teeth). In advanced cases, teeth loosen and fall out. Bacteria enter the bloodstream and can damage the heart, kidneys, and liver.

2. Tooth Resorption (Affects 30–70% of Cats)

This painful condition involves the body breaking down its own tooth structure from the inside. The cause is unknown. Affected teeth develop holes that expose the sensitive pulp, causing severe pain. There is no way to prevent tooth resorption — the only treatment is extraction of affected teeth.

3. Feline Stomatitis

A severe, often debilitating inflammation of the mouth lining. The immune system overreacts to plaque bacteria, causing widespread ulceration and intense pain. Affected cats may drool, refuse food, and lose significant weight. Treatment often requires full or near-full mouth extraction — which, counterintuitively, dramatically improves quality of life in most cases.

4. Oral Tumours

Squamous cell carcinoma is the most common oral cancer in cats. Any mass, non-healing ulcer, or facial swelling warrants immediate veterinary evaluation.

Watch for these often-subtle indicators:

Eating Changes

• Dropping food while eating
• Chewing on one side only
• Preferring wet food over dry (less chewing required)
• Swallowing kibble whole instead of crunching
• Eating less than usual or taking longer to finish meals

Behavioural Changes

• Pawing at the mouth or face
• Head shaking or tilting while eating
• Running away from the food bowl mid-meal
• Increased irritability or aggression when touched near the face
• Hiding more than usual
• Reduced grooming (leading to a dull, matted coat)

Physical Signs

• Bad breath (halitosis) — the most obvious sign
• Drooling (especially if bloody or excessive)
• Red, swollen, or bleeding gums
• Visible tartar (yellow-brown buildup on teeth)
• Facial swelling

Preventing dental disease in cats is challenging — most cats don't tolerate tooth brushing as readily as dogs. But several strategies, used together, make a significant difference:

Best: Tooth Brushing

• Use a cat-specific finger brush or small soft-bristled brush
• Cat-safe enzymatic toothpaste (poultry flavour is usually best accepted)
• Start gradually: lip lifting → finger on teeth → toothpaste on finger → brush
• Focus on the outer surfaces of the upper teeth (most plaque accumulates here)
• Even 30 seconds of brushing is beneficial if daily

Good: Dental-Specific Products

• Dental diets — VOHC-approved kibble with larger pieces and special texture
• Dental treats — look for VOHC seal; limit to recommended daily amount
• Water additives — antimicrobial solutions; mild benefit, well tolerated

Essential: Regular Veterinary Dental Exams

• Annual dental check (part of routine health exam)
• Professional cleaning under anaesthesia when recommended — typically every 1–3 years
• Dental X-rays to detect tooth resorption and root problems invisible above the gumline

For a schedule of all preventive care your cat needs, see our vet visit frequency guide.

Many owners worry about anaesthesia for dental procedures. Here's what to expect:

• Pre-anaesthetic blood work — checks organ function to ensure your cat can safely undergo anaesthesia
• General anaesthesia — necessary for a thorough exam, X-rays, and cleaning below the gumline. "Anaesthesia-free" dental cleanings are not recommended by veterinary dental specialists — they're cosmetic only and miss disease below the gumline
• Full oral exam — the vet probes every tooth and checks for pockets, resorption, and masses
• Dental X-rays — reveal root disease invisible from above
• Scaling and polishing — ultrasonic removal of tartar above and below the gumline, then polishing to smooth the enamel
• Extractions if needed — teeth with advanced disease or resorption are removed (cats cope remarkably well without teeth)
• Pain management — nerve blocks during the procedure and pain medication for home

Cost varies widely: £200–£600 for a basic cleaning, more if extractions are needed. See our dental care guide for a full breakdown of costs and our vet bill saving tips to manage expenses.