Do dogs really get cavities?
Yes, but not as often as people expect. A cavity (also called caries or tooth decay) happens when bacteria in plaque ferment sugars and produce acid that wears away the tooth. Dogs can develop this, but veterinary dentists report that it is uncommon compared with gum disease. Dog teeth are generally more cone-shaped than human teeth, and dog saliva tends to be less acidic, which are two reasons given for the difference.
This matters because many dogs that appear to have “rotten teeth” are actually dealing with periodontal (gum) disease, tooth fractures, or heavy tartar. Only a vet exam can tell which one it is, and the right treatment depends on the answer.
What a cavity can look like, and what it can be confused with
Decay typically shows up as a dark spot or a pit on a tooth, often on the flat chewing surfaces of the back teeth. A veterinary dentist describes some lesions as feeling sticky when probed. As decay deepens, dogs may show signs of pain such as:
- Drooling or dropping food
- Chewing on one side or reluctance to eat hard food
- Bad breath
- Discolored teeth
- Bleeding from the mouth
- Swelling in or around the mouth
Many of these signs are not specific to cavities. Loose or missing teeth are more often caused by advanced gum disease. Red or bleeding gums point to gingivitis (see dog gingivitis symptoms and treatment). Yellow-brown buildup is tartar (see dog tartar removal methods). A broken tooth from chewing something hard can look like decay too. Because it is hard to tell at home, any suspicious spot or sign of mouth pain deserves a veterinary exam.
Causes and risk factors
Decay needs bacteria, a food source for them, and time on the tooth. Factors that may raise the risk include:
- Plaque left on the teeth for long periods
- A diet high in fermentable carbohydrates or sugary treats
- Crowded or misaligned teeth
- Gum recession that exposes more of the tooth
- Weaker enamel
- Some small and flat-faced breeds, which are sometimes reported as being more prone to dental problems in general
How vets diagnose and stage a cavity
Your vet will look at the mouth and may need to probe a suspicious spot to learn how deep it goes. That usually requires general anesthesia, and dental X-rays help show what is happening inside the tooth and below the gum. Vets commonly describe decay in five stages:
- Only the enamel is affected.
- The decay has reached the dentin beneath the enamel.
- The decay has reached the pulp chamber inside the tooth.
- The crown of the tooth is structurally damaged.
- Most of the crown is lost and the roots are exposed.
Treatment options by stage
Treatment depends on the stage and on the tooth’s overall health. Your vet or a veterinary dentist will decide what is appropriate.
Early decay
For stages 1 and 2, the vet may remove the damaged tooth material and restore the tooth with a filling. Very early spots may sometimes be monitored or treated with a protective agent, according to the clinic.
Deeper decay and root canals
When decay reaches the pulp (stage 3), the tooth is infected inside. A root canal, which cleans out and seals the inside of the tooth before restoring the crown, may be an option, typically at a clinic with dental equipment or a veterinary dental specialist. Not every dog or tooth is a candidate.
Advanced decay and extraction
At stages 4 and 5, the tooth is often too damaged to save, and extraction is the usual way to end the pain and infection. Dogs usually adapt well to losing teeth, and many are more comfortable afterward. For what to expect at home, see dog post dental surgery care.
Your vet may prescribe pain relief or other medication after treatment. Give only what is prescribed, exactly as directed, and never give human pain relievers to your dog.
Is it too late to help my dog’s teeth?
Usually not. Even older dogs with significant dental disease can often be helped, though the plan depends on their overall health. Your vet can assess whether anesthesia is reasonable, what treatment is needed, and how to manage pain. Waiting generally makes problems harder to treat, so an exam sooner is better than later. Starting brushing and other home care after dental treatment can also help protect the teeth that remain.
Preventing future decay
- Brush daily with a dog toothpaste, using a soft brush (our guide to taking care of your dog’s teeth explains how).
- Avoid sugary treats and human snack foods.
- Choose chews carefully. VOHC-accepted products have been evaluated for plaque or tartar control, but very hard items can break teeth.
- Schedule regular dental exams, at least yearly unless your vet says otherwise.
- Do not rely on a groomer or on home scaling for cleaning. Veterinary cleaning under anesthesia lets the vet look under the gum and take X-rays.
When to call the vet
Call your veterinarian if your dog has a dark spot or hole in a tooth, a broken tooth, drools or drops food, stops eating, paws at the face, or has a swollen face. Facial swelling, bleeding that does not stop, or refusing food for more than a day should be treated as urgent.
This article is general information and does not replace a diagnosis from a veterinarian.