Signs of Dental Disease in Cats: What to Watch For

Hi, I'm Matt, founder of Giddy Pets. Cats are masters at hiding pain, and dental disease is one of the things they hide best. Many cats carry on eating and behaving fairly normally even with sore mouths, which is exactly why owners often miss it. Knowing the subtle signs means you can act before things get serious, and a sore mouth is treatable — the hard part is simply spotting it. This guide covers what to look for, what you can check at home, and when it's time to involve your vet.

This is general guidance, not a substitute for veterinary advice — if you're worried about your cat's teeth or gums, contact your vet.

Why it matters

Dental disease is extremely common in cats, with most having some degree of it by the age of three. As well as gingivitis and tartar build-up, cats are particularly prone to two painful conditions: tooth resorption, where the tooth structure breaks down, and gum inflammation that can become severe. Because cats instinctively mask discomfort, problems often progress further before they're spotted than they would in a more vocal pet — so paying attention to small changes really pays off.

There's an evolutionary reason cats are so stoic: in the wild, showing weakness makes an animal a target, so cats are hardwired to carry on as normal even when they're sore. That instinct is wonderful for survival but unhelpful for owners, because it means a cat can have significant mouth pain while still eating, purring and going about their day. The takeaway is simple: don't wait for your cat to "tell" you something is wrong. Build a habit of noticing the small stuff, and book a check if anything seems off.

Signs of trouble to watch for

Watch for these clues, especially in combination:

• Bad breath — one of the earliest and most common signs
• Red, swollen or bleeding gums, particularly along the gumline
• Brown or yellow tartar on the teeth
• Drooling, sometimes tinged with blood
• Pawing at the mouth or rubbing the face
• Dropping food, chewing on one side, or eating more slowly
• Going off dry food in favour of softer food
• Weight loss from eating less
• Reduced grooming or a scruffier coat, because grooming hurts
• Behaviour changes — hiding more, or becoming grumpy when touched near the head

No single sign confirms dental disease, but several together, or any that persist, are worth a vet visit. It can help to keep a mental (or actual) note of when you first noticed something and whether it's getting worse, as that's useful information for your vet.

What you can do at home

Have a gentle look in your cat's mouth when they're relaxed — lift the lip and check the gums and teeth for redness, tartar or anything that looks sore. Healthy gums are usually pink, not red and angry along the gumline. Do this regularly, even just once a week, so you get to know what normal looks like for your cat and can spot a change early.

The most effective home prevention is brushing; our how to clean a cat's teeth guide shows you how to start without the drama. Use a cat toothpaste and finger brush from our shop, never human toothpaste, which is toxic to cats. Vet-recommended dental diets and chews can support oral health as an extra. Home care helps prevent disease and lets you catch it early, but it won't fix problems that have already taken hold — those need a vet, and some, like resorptive lesions, can only be properly diagnosed and treated in the clinic.

When to see a vet

See your vet promptly if you notice persistent bad breath, red or bleeding gums, heavy tartar, drooling, difficulty or reluctance to eat, weight loss, or any sign of mouth pain. Don't wait for things to become obvious — by cat standards, visible symptoms often mean it's already advanced. Your vet can examine the mouth properly, check for resorptive lesions (which aren't always visible from the outside), and recommend a scale and polish or extractions under anaesthetic if needed. A full assessment often involves dental x-rays under anaesthetic, because much of what affects cats' teeth happens below the gumline where it can't be seen on a conscious exam — so don't be surprised if your vet recommends this. Treating a painful mouth usually makes a real difference to how a cat feels, eats and behaves, so it's well worth doing. For the wider picture, see our pet dental hub and gingivitis in dogs for how the early stages look.

Not registered with a vet? Our vets directory can help. Worried about cost? The pet emergency cost calculator and pet insurance guide help you plan ahead.

Sources

• Cats Protection — Cat Care Advice
• PDSA — Looking After Your Cat
• Blue Cross — Pet Advice