By 3 years of age, about 70 percent of cats already have some periodontal disease, and most owners hear it at a cleaning rather than notice it at home, because a cat with a sore mouth rarely stops eating. It changes how the cat eats: chewing on one side, dropping kibble after 2 or 3 crunches, or turning the head away when a hand nears the muzzle usually means pain that has been there 3 to 6 months.
Five Signs That Point at Teeth
- One-sided chewing: food collects on one side, and the head tilts 15 to 30 degrees while eating.
- Dropping food: kibble falls out after 2 to 3 bites, the cat walks off and returns 5 minutes later.
- Drooling: a wet chin, or a damp patch 2 to 3 cm across on the bedding, worse after meals.
- Pawing or rubbing: 5 to 10 seconds of pawing at one cheek, or rubbing the jaw along furniture and door frames.
- Head shy: flinching when a hand comes within 10 cm of the muzzle, or refusing the lip lift that was easy 6 months ago.
Three supporting signs raise the odds: bad breath returning within 4 to 6 weeks of a cleaning, a 5 to 10 percent weight loss over 6 months with normal appetite, and scruffy chin fur from less grooming.
What Is Actually Happening in There
Plaque mineralizes into calculus within 24 to 48 hours, and gum-line calculus is 1 to 3 mm thick once visible. The margin then sits 1 to 2 mm lower than it should, and a sulcus deeper than 1 mm is already attachment loss. Stage 1 periodontitis means under 25 percent of attachment gone, Stage 2 means 25 to 50 percent, Stage 3 over 50 percent with mobile teeth. Past Stage 1 it is not reversible: cleaning removes the cause, but lost bone does not return.
Tooth resorption is the second problem, and owners never see it. It affects 20 to 60 percent of cats, rises sharply after age 5, and often starts at the neck of the tooth. The crown can look normal while the root is replaced by bone, and the pain is sharp because dentin is exposed. Lesions tend to be symmetrical: one resorbing premolar means a 50 to 70 percent chance of the same lesion on the other side.
The 60-Second Check at Home
Lift the lip with 2 fingers and look at 6 zones: upper right, upper left, lower right, lower left, the front incisors, and the outside of the back molars. You are looking for 3 things: a red line at the gum margin wider than 1 mm, brown calculus 1 to 3 mm thick along it, and a crown that looks pink, chalky or chipped at the neck. Ten seconds per side, once a week. Stop when the cat flinches and write down which side; that note is more useful than a description of the breath.
Risk Climbs With Age
These intervals suit a cat with no other disease; one with CKD, diabetes or hyperthyroidism moves up a row.
| Age | Periodontal disease | Resorption | Exam interval |
|---|---|---|---|
| under 3 years | under 20% | under 10% | every 12 months |
| 3 to 6 years | about 70% | 20–30% | every 12 months |
| 7 to 10 years | 80–90% | 30–50% | every 6 to 9 months |
| 11 years and up | over 90% | 50–60% | every 6 months |
The Five Checks Before Anesthesia
- Bloodwork: CBC plus chemistry, which catches anemia, dehydration and a creatinine that changes the protocol.
- T4 and blood pressure: both are routine in cats over 8, and untreated hyperthyroidism raises anesthetic risk.
- Heart: auscultation at minimum, with an ECG or a cardiology review if there is a murmur or an arrhythmia.
- Urinalysis: concentrating ability and protein tell you how well the kidneys handle fluids and drugs.
- Chest radiographs: not routine, but indicated with a murmur, a cough or a history of asthma.
Ask for the ASA grade in writing. ASA 1 and 2 cats go home the same day; ASA 3 needs IV fluids and a dedicated nurse; ASA 4 is a conversation about whether the teeth are worth the risk this month. Fasting is 4 to 6 hours for food and 1 to 2 for water, not the 12 hours used in dogs. Cats under 4 kg or over 6 kg deserve a printed drug calculation, since most anesthetic errors in cats are dosing errors.
Why Anesthesia-Free Cleaning Is a Bad Deal
Scaling without anesthesia removes the calculus you can see and leaves what is below the gum line, which is where the disease lives. It also hurts: an inflamed margin is 1 to 2 mm of exposed tissue, and a scaler along it feels like cleaning under a fingernail that has been pulled back. The result is a mouth that looks clean for 4 to 8 weeks, a cat that learns to fight the procedure, and disease progressing under a shiny crown. Most veterinary dental bodies advise against it.
The First 7 to 10 Days After Extractions
Feed soft food or soaked kibble at room temperature for 7 to 10 days, 4 to 6 small meals a day instead of 2 large ones. No hard treats, chew toys or brushing for 10 to 14 days. Swelling peaks at 48 to 72 hours and should be gone by day 7. Blood-tinged saliva in the first 24 hours is normal; active bleeding, 24 hours without food, or a cheek that swells more after day 3 means a call. Pain relief is prescription-only, and human painkillers such as paracetamol and ibuprofen are toxic to cats at fractions of a tablet.
What the Bill Looks Like
A cleaning with full-mouth radiographs runs 350 to 800 USD in most US clinics, and the radiographs are 100 to 200 USD of that. Extractions add 30 to 120 USD per tooth, and full-mouth extraction with 3 hours of anesthesia can reach 1,200 to 2,000 USD. Radiographs are not optional: 1 in 3 lesions seen on film is invisible on exam, and 40 percent of cats have resorption that shows only on film. The cost calculator splits these items by city.
Six Steps for This Month
- Do the 60-second lip lift tonight and note which side the cat pulls away from.
- Book a dental exam with radiographs, not a scale-and-polish appointment.
- Ask for bloodwork, T4, blood pressure and an ASA grade before agreeing to anesthesia.
- Start brushing 3 times a week with a soft finger brush and pet toothpaste, never human toothpaste.
- Switch to a VOHC-accepted dental chew or a dental diet if brushing is impossible.
- Book the next check at 6 months if the cat is over 10, at 12 months if younger.
Go Now, Not Next Month
A cat that stops eating for 24 hours, drools continuously, has facial swelling under one eye, or has a jaw that clicks or deviates to one side needs same-day care; the last sign can mean a fracture or an abscess tracking behind the eye. Full staging detail is in dental disease in cats, the resorption-specific signs are collected in tooth resorption signs, and long-term costs are modeled in the cost calculator.
Terms mentioned in this article
Frequently asked
My cat still eats, so can the teeth really hurt?
Yes. Cats rarely stop eating with dental pain, because eating is survival behavior; they switch to one-sided chewing, swallow kibble whole, drop food and eat slower. A cat that keeps eating can still have Stage 3 periodontal disease or a resorbing tooth, so the lip lift and a dental exam matter more than appetite.
Is anesthesia-free dental scaling safe for an old cat?
It is safer in the sense that no anesthetic is used, and much worse in every other way. Scaling without anesthesia leaves calculus below the gum line, hurts an already inflamed margin, and hides progressing disease for 4 to 8 weeks. Old cats do better with bloodwork, T4, blood pressure and an ASA grade than with a procedure that cannot reach the problem.
How many teeth can a cat lose and still eat normally?
Most cats manage well after losing many or all teeth, because they swallow food with little chewing anyway. Soft food for 7 to 10 days, then soaked kibble, is usually enough. Cats with few teeth often eat better than before, since chronic mouth pain was suppressing appetite for months.