Short answer: Dental problems become more common with age. A 2021 Royal Veterinary College study found that dogs aged eight or over were three times more likely to be diagnosed with periodontal disease than dogs aged two to four, and a 2023 study found that cats over nine had more than six times the odds of cats under three. Keep the routine going but make it gentler, watch for quiet pain signs such as chewing on one side or dropping food, and have a veterinary dental check at least once a year, or more often if your vet advises.
How mouths change with age
For this guide, "senior" loosely means dogs from about eight and cats from about nine, the ages at which the Royal Veterinary College studies saw risk climb. Your vet will tell you when your own pet counts as senior.
By then a mouth has had years of use. Here is what vets commonly look for in older pets. It is education, not a home checklist.
- Wear. Flattened or worn tooth surfaces, often from years of chewing.
- Gum recession. Gums that have pulled back, exposing more tooth or the roots.
- Loose or missing teeth. Often a sign that the tissues holding a tooth have been lost over time.
- Tartar and changes below the gumline. The longer plaque has had, the more there is to assess, and much of it can only be seen on dental X-rays under anaesthesia.
- Tooth resorption in cats. A process in which the structure of a tooth is gradually lost, often at or below the gumline.
- Lumps, sores or swelling. Anything new in an older mouth deserves a prompt veterinary look.
Sources: Royal Veterinary College VetCompass, epidemiology of canine periodontal disease (2021); O'Neill and colleagues, periodontal disease in cats under primary veterinary care in the UK (2023). Population figures are for education only. They are not a statement about your pet or about any product.
Pain signs that are often missed
Older pets rarely cry out about their mouths. They adapt, and the adaptations are easy to put down to age. The American Animal Hospital Association lists changes in eating habits, weight loss, lethargy and behaviour among the possible indirect signs of dental pain. Watch for:
- Eating on one side, or tilting the head while chewing.
- Dropping food, or chewing slowly and carefully.
- Preferring soft food, or leaving hard food, chews and toys that used to be favourites.
- Head shyness: pulling away when the face or mouth is touched, or resisting the lip-lift.
- Pawing or rubbing at the mouth or face.
- Drooling, sometimes tinged with blood.
- Grooming less (in cats), or swallowing food without chewing it.
- Weight loss, grumpiness or less interest in play.
A good appetite does not rule out a sore mouth. Feline veterinary guidance notes that many cats keep eating despite oral pain, and dogs can work around a sore mouth too. If you are unsure, ask your vet to look.
When to see your vet
If you notice loose or wobbly teeth, swelling, discharge, bleeding that does not settle, reluctance to eat, dropping food, drooling, pawing at the mouth or any change in behaviour, please contact your veterinary surgeon promptly. Home care supports professional care — it never replaces it.
Adjusting the routine
The routine does not stop in later life. It gets gentler.
- Softer tools. An ultra-soft, small-headed brush, a finger brush or a textured wipe. Exposed roots can be sensitive, so light pressure matters even more.
- Shorter sessions. Split the clean: one side in the morning, the other in the evening. Thirty calm seconds beat two tense minutes.
- A comfortable position. Let a stiff older pet lie on a soft surface, and sit beside them rather than holding them.
- Softer chews and toys. Soft, flexible toys only, and no hard chews, especially if teeth are worn, loose or missing. Always supervise.
- Re-check servings. If your pet's weight has changed, check any dental powder serving against the pack. If your pet has a health condition, takes medication or eats a veterinary diet, ask your vet before adding or continuing any complementary feed.
- Watch the water. If your pet starts drinking noticeably more or less, tell your vet; do not assume it is the water additive.
If a clean seems to hurt, or the gums bleed, stop and book a check. Brushing a sore mouth does more harm than good.
Anaesthesia and older pets
Many parents of older dogs and cats worry most about the anaesthetic. It is a fair question, and one for your vet, who will weigh the risks of an anaesthetic against the discomfort of leaving a sore mouth as it is. Age alone does not settle it; the individual pet does.
Before a dental procedure, your vet assesses each pet's individual risk. That usually starts with a full examination and a discussion of any health conditions and medicines, and may include blood tests or other checks. During the procedure the airway is protected and the anaesthetic is monitored throughout. This is general education, not advice about your pet; your vet will explain what they propose and why. Questions worth asking:
- What checks will you do before the anaesthetic?
- How will my pet be monitored, and by whom?
- Will you take dental X-rays?
- If a tooth needs to come out, how will you contact me?
- What should I expect at home afterwards, and when can we restart cleaning?
Anaesthesia-free cleaning is not a gentler alternative. The American Animal Hospital Association's 2019 dental care guidelines call it "not appropriate" for dogs and cats, because nothing below the gumline can be cleaned or assessed in an awake animal.
Veterinary checks in later life
Aim for a veterinary dental check at least once a year; twice a year is a sensible rhythm for many seniors and small breeds, and your vet will say what suits your pet. Take your notes from the weekly lip-lift, and mention anything you have noticed about eating, grooming or behaviour, even if it seems minor. Between checks, book promptly for any of the signs to watch.
Senior cats
In cats, age is the strongest risk factor: in the 2023 Royal Veterinary College study, affected cats had a median age of 9.5 years, against 4.9 years for unaffected cats. Three points matter most for older cats:
- Kelp and thyroid. Kelp is naturally rich in iodine, and thyroid conditions are common in older cats. If your cat has one, or takes thyroid medication, ask your vet before using any kelp-containing product.
- Quiet signs. Grooming less, preferring soft food, tilting the head to chew or swallowing without chewing are all worth a veterinary look.
- Cat products only. Toothpaste, powders and water additives labelled for cats, free of essential oils and phenols.
Comfort first
In later life, the goal of dental care is comfort. A pet who can eat what they enjoy, groom, carry a favourite toy and lean into a stroke along the jaw is a pet whose mouth is working for them.
Small, regular steps are kinder than big, occasional ones: a gentle daily clean, a weekly look, a note of what you see, and a vet who knows your pet's mouth. None of it needs more than a few minutes a day, and all of it helps you notice when something changes.
How we grade evidence
Every scientific statement on this site carries a grade: A product-specific controlled trial · B strain- or species-specific study in dogs or cats · C species mechanistic evidence · D laboratory (in-vitro) evidence · E theoretical rationale. The strength of a claim never exceeds the strength of its evidence. Read our evidence standards.