Signs of Dental Pain in Pets: What to Watch For

Dental disease is the most common health condition in adult pets — affecting an estimated 80 per cent of dogs and 70 per cent of cats by the age of three. Yet the majority of these animals suffer in silence, with their owners completely unaware that they are in pain.

"Pets are remarkably stoic when it comes to dental pain. I regularly extract severely infected teeth and the owner tells me they had no idea anything was wrong because their pet was still eating. Eating is a survival instinct — a pet in dental pain will eat through it because the alternative is starvation." — Dr. Sarah Chen, DVM

This stoicism is an evolutionary trait. In the wild, showing pain makes an animal vulnerable to predators and rivals. Dogs and cats instinctively hide discomfort, which means the signs of dental pain are often subtle — changes in behaviour, preferences, and habits that owners may attribute to ageing, mood, or personality rather than a medical problem.

Understanding what to look for is the first step toward getting your pet the help they need. Dental pain is treatable, and pets that receive appropriate care often show dramatic improvements in energy, appetite, and overall demeanour. For broader guidance on spotting discomfort, see our article on recognising pain in pets.

The most obvious (but still frequently missed) signs of dental pain relate to how your pet eats and drinks. Because eating involves direct contact with painful teeth and gums, changes here are often the earliest indicators.

Signs to Watch For

• Chewing on one side: Your pet tilts their head while eating or consistently chews on only one side of the mouth to avoid a painful area.
• Dropping food: Food falls from the mouth during eating. Your pet may pick up food enthusiastically but then drop it or spit it out mid-chew.
• Preferring soft food: A sudden preference for wet food over dry kibble, or reluctance to eat hard treats they previously enjoyed.
• Slower eating: Meals that used to take 2 minutes now take 10. Your pet approaches the bowl eagerly but eats cautiously.
• Messy eating: More food on the floor around the bowl than usual, or water dripping from the mouth after drinking.
• Reduced appetite: In advanced cases, pets may eat significantly less or refuse food entirely. This is a veterinary emergency if it persists for more than 24 hours in cats or 48 hours in dogs.

A particularly telling sign is a pet that shows excitement at mealtime (indicating they are hungry) but then eats slowly, reluctantly, or walks away. Hunger plus reluctance to eat strongly suggests oral pain.

Dental pain affects more than just eating — it influences your pet's mood, activity level, and daily habits. Many of these changes are gradual, making them easy to dismiss as normal ageing.

Behavioural Changes

• Head shyness: Pulling away when you try to touch their face, head, or muzzle. A pet that previously enjoyed face rubs but now flinches is sending a clear signal.
• Increased irritability: Snapping or growling when approached, particularly during meals or when other pets are nearby. Chronic pain makes animals defensive.
• Reduced playfulness: Dogs that stop playing tug, carrying toys, or fetching. Cats that stop grooming their face or playing with toys they need to bite.
• Withdrawal: Hiding, sleeping more, less interest in interaction. Pain is exhausting, and pets in chronic pain often seem depressed.
• Pawing at the face: Rubbing the face on furniture, carpet, or with a paw — especially one-sided rubbing that targets a specific area.

Physical Signs

• Bad breath: Persistent foul odour from the mouth — often described as rotten or metallic — indicates bacterial infection.
• Visible tartar: Yellow or brown buildup on the teeth, particularly along the gum line.
• Red, swollen, or bleeding gums: Healthy gums should be pink and firm. Redness, puffiness, or bleeding when eating hard food indicates gingivitis or periodontal disease.
• Drooling: Excessive or one-sided drooling, especially if the saliva is blood-tinged.
• Facial swelling: A swelling below the eye or along the jaw can indicate a tooth root abscess — this requires urgent veterinary attention.

Cats deserve special attention because they are even more skilled at hiding dental pain than dogs, and they suffer from a unique dental condition that does not affect other species.

Feline Tooth Resorption

Tooth resorption (previously called feline odontoclastic resorptive lesions or FORLs) affects an estimated 30 to 70 per cent of cats. The body's own cells begin destroying the tooth structure from within, creating painful erosions that expose the sensitive nerve. There is no known cause and no prevention — the only treatment is extraction of affected teeth.

Resorptive lesions are excruciatingly painful but difficult to detect without dental X-rays. Affected cats may show jaw chattering or trembling (especially when eating), sudden startling or crying out while eating, and excessive salivation.

Cat-Specific Behavioural Signs

• Reduced grooming: Cats in oral pain may stop grooming, leading to a matted, unkempt coat. A cat that has always been immaculate but suddenly looks dishevelled deserves a dental check.
• Changed grooming pattern: Grooming only one side of the body while avoiding the painful side of the face.
• Jaw chattering: A rapid, involuntary jaw movement that sometimes occurs when a cat touches a painful tooth while eating or grooming.
• Running from the food bowl: A cat in acute dental pain may approach food, take one bite, cry out, and run away. This is heartbreaking but unmistakable.
• Weight loss: Gradual, unexplained weight loss in a cat should always prompt a dental examination among other diagnostics.

For comprehensive feline dental guidance, see our article on cat dental disease prevention and signs.

If you recognise any of the signs described above, the most important step is to schedule a veterinary dental examination as soon as possible. Dental pain rarely resolves on its own — it only gets worse.

The Veterinary Dental Examination

A conscious oral exam (your vet looking in your pet's mouth while they are awake) provides useful information but cannot give the full picture. Many dental problems — root disease, resorptive lesions, jaw fractures — are invisible without dental X-rays, which require general anaesthesia. If your vet recommends a dental procedure under anaesthesia, it is because a thorough assessment and proper treatment simply cannot be done on an awake animal.

Common Treatments

• Professional cleaning: Scaling and polishing under anaesthesia to remove tartar above and below the gum line.
• Extraction: Removing severely diseased or fractured teeth. While this sounds drastic, pets almost always feel dramatically better after painful teeth are removed.
• Antibiotics: For active infections, particularly abscesses.
• Pain management: Both during and after dental procedures, and sometimes as ongoing management for chronic conditions.

Do Not Wait

Many owners delay dental treatment because of anaesthesia concerns or cost. But dental disease is progressive — what might be a simple cleaning today could become multiple extractions and a larger bill in six months. More importantly, your pet is suffering every day the condition goes untreated.

Prevention is always better and cheaper than treatment. Establishing a daily dental care routine after professional treatment keeps your pet comfortable and reduces the frequency of future procedures.