Dog Teeth vs Cat Teeth: How They Differ and Why It Matters
By Dr. Zubair Khalid, DVM, MS, PhD ·
Dog teeth vs cat teeth differ in count, shape, and the dental problems each species tends to develop. Dogs have more teeth and flatter chewing surfaces for crushing, while cats have fewer, sharper teeth built for shearing meat. Knowing what is normal for your pet helps you spot trouble early.
This article is educational and is not a substitute for veterinary diagnosis or treatment.
Quick Answer
- Most dogs have 42 permanent teeth and most cats have 30 [1][2].
- Dogs have 28 deciduous (baby) teeth and cats have 26 [1][2].
- Dog teeth erupt faster, with all permanent teeth in place by about 7 months, while cats finish around 4 to 7 months [1][2].
- Both species are diphyodont, meaning they grow two sets of teeth in a lifetime, just like people [3].
- Periodontal disease risk climbs with age in both species, but the rate of increase is roughly 3.5% lower in cats than in dogs [4].
Dog and Cat Dental Anatomy: What Makes Them Different
Both dogs and cats are carnivores, so their teeth share a basic plan. Each tooth has a crown above the gum line and one or more roots below it. Inside sits the pulp, which holds nerves, blood vessels, and connective tissue. The pulp is wrapped in dentin, and enamel covers the crown [3].
The differences show up in the details.
Tooth Count and Types
Dogs have 42 permanent teeth. That set includes incisors for nibbling, long canines for gripping, premolars, and molars. Cats have 30 permanent teeth, with a similar mix but fewer of them [1][2].
The canine tooth itself is a study in function. In dogs, canine tooth shape varies with diet and killing behavior, and researchers have measured this variation across breeds using 3D imaging [5]. A dog's canine is a thick, curved gripping tool. A cat's canine is thinner and straighter, designed to deliver a quick, precise bite.
Jaw Shape and Bite
Cats have shorter jaws than dogs, which changes how the upper and lower teeth meet. When that meeting goes wrong, the result can be malocclusion, where teeth strike soft tissue instead of sliding past each other. A study of cats with traumatic malocclusion found measurable links between skull shape and the odds of this problem [6]. This is one reason your veterinarian checks your cat's bite at every exam.
Wear and Tear
Adult teeth do not grow back. Tooth wear and disease have to be managed for life, and animals adjust their chewing to cope [7]. In dogs, veterinarians can sometimes estimate age by looking at wear patterns on the teeth, though this works better in large breeds than in small or toy breeds [2].
How Teeth Develop: A Timeline for Dogs and Cats
Knowing when teeth appear helps you tell normal development from a problem.
Puppy and Kitten Teeth
Puppies start getting baby teeth at 3 to 5 weeks of age [2]. Kittens start a little earlier, with deciduous incisors erupting at 2 to 4 weeks and deciduous premolars at 5 to 6 weeks [1].
Adult Teeth
Puppies begin replacing baby teeth with permanent teeth at around 4 to 5 months, and all 42 permanent teeth are usually in place by 7 months [2]. Kittens start this process around 4 to 7 months [1].
A Comparison Table
| Feature | Dogs | Cats |
|---|---|---|
| Deciduous teeth | 28 [2] | 26 [1] |
| Permanent teeth | 42 [2] | 30 [1] |
| Baby teeth erupt | 3 to 5 weeks [2] | 2 to 6 weeks [1] |
| Adult teeth appear | 4 to 5 months [2] | 4 to 7 months [1] |
| All adult teeth present | About 7 months [2] | About 7 months [1] |
Step-by-Step: Checking Your Pet's Teeth at Home
You do not need special training to do a basic mouth check. You do need good light and a calm pet.
- Start when your pet is relaxed. Sit beside them instead of looming over them.
- Lift the lip on one side. Look at the outer surface of the teeth and the gum line.
- Check the other side the same way.
- Look at the front teeth and the canine teeth.
- Gently open the mouth just enough to see the back teeth if your pet allows it.
- Note any redness, swelling, tartar, broken teeth, or bad breath.
- Feel along the outside of the jaw for lumps or tenderness.
- Write down what you see and when you saw it. Bring that note to your vet visit.
Do this weekly. Small changes are easier to catch when you look often.
Supplies and Setup That Actually Matter
You do not need a cabinet full of products. You need a few that work.
- Pet-safe toothpaste. Human toothpaste is not meant to be swallowed and should not be used in pets. Ask your veterinarian which pet toothpaste to use.
- A soft brush or finger brush. Match the size to your pet's mouth. A cat needs a much smaller brush than a large dog.
- A light source. A small flashlight or a headlamp makes the back teeth visible.
- A reward. Follow every session with praise or a treat your vet approves.
- A written log. Track brushing dates and anything unusual you notice.
Professional care matters too. Learn what happens during a dental cleaning for dogs and cats so you know what to expect before you book one.
Common Dental Problems in Dogs vs Cats
The two species share many dental diseases, but the patterns differ.
Periodontal Disease
Periodontal disease is one of the most common oral disorders in companion animals [4]. A large analysis of insurance claims found that risk rises with age in both dogs and cats, and the rate of increase in cats was about 3.5% lower than in dogs [4]. Body size was strongly linked to the predicted probability of a periodontal disease claim in young dogs [4].
Retained Baby Teeth
Sometimes a baby tooth does not fall out when the adult tooth comes in. In one review of 305 deciduous canine tooth extractions, 58.4% were done because of persistent deciduous teeth [8]. These extractions were performed in both dogs and cats [8].
Malocclusion
Cats can develop malocclusion that causes trauma to the soft tissues of the lower jaw [6]. This is not just a cosmetic issue. Ongoing trauma can lead to chronic pain and infection.
Tooth Wear
Wear is a normal part of aging for carnivore teeth, and animals compensate by changing how they chew [7]. Heavy wear can expose the pulp, which is painful.
Fractured Teeth
A fractured tooth that exposes the pulp is a common reason for extraction, accounting for 6.6% of the extractions in one study [8]. A broken tooth with a visible pink or red center needs prompt veterinary attention.
For a broader look at how these conditions progress, see dental disease in dogs and cats.
Signs That Something Is Wrong
Watch for these signs and act on them.
- Bad breath that does not improve with brushing
- Drooling more than usual
- Dropping food or chewing on one side
- Pawing at the mouth or face
- Red, swollen, or bleeding gums
- Visible tartar, which looks like brown or yellow buildup
- Loose or missing teeth
- A broken tooth, especially one with a pink or red center
- Swelling around the jaw or under the eye
- Reluctance to eat hard food
- Weight loss
- Flinching when you touch the mouth
Dental pain in pets is often subtle. Many animals keep eating right up until the problem is advanced.
Common Mistakes Owners Make
- Assuming bad breath is normal. It is one of the most common signs of dental disease.
- Waiting for obvious pain. Pets hide oral pain well.
- Using human toothpaste. It is not made for pets to swallow.
- Skipping the back teeth. The molars and premolars collect the most tartar.
- Ignoring baby teeth that never fall out. Persistent deciduous teeth were the most common reason for extraction in one large review [8].
- Thinking small dogs have fewer problems. Small and toy breeds can be harder to age by their teeth, and small dogs often need close dental monitoring [2].
- Skipping professional exams because the teeth look white. Problems often start below the gum line.
- Delaying care because your pet still eats. Appetite is a poor guide to dental comfort.
When Your Vet Needs to Look Deeper
A visual exam only shows part of the picture. Your veterinarian may recommend dental radiographs to see the roots and the bone around them. That imaging step is covered in dental radiography positioning and interpretation in dogs and cats.
Home care and professional care work best together. For a full prevention plan, read dental care for dogs and cats.
Limitations and When to Contact a Veterinarian
This article gives general information. Your pet's individual case needs a veterinarian who can examine the mouth, take images if needed, and decide on treatment.
Contact a veterinarian the same day if you see:
- A broken tooth with a pink or red center
- Bleeding from the mouth that does not stop
- Sudden swelling of the face or jaw
- Drooling that started suddenly
- Your pet refusing all food
Go to an emergency clinic now if you see:
- Trouble breathing along with mouth or face swelling
- A swollen area under the eye with fever or lethargy
- Severe bleeding
- A jaw that appears broken or misaligned
Schedule a routine visit if you notice:
- Bad breath that has gotten worse over weeks
- Tartar buildup along the gum line
- A loose tooth
- Gradual weight loss
- Chewing on one side
If you are not sure which category fits, call your veterinary clinic and describe what you see. They can tell you how soon your pet needs to be seen.
Frequently Asked Questions
Do dogs and cats have the same number of teeth?
No. Dogs have more teeth than cats in both sets. This difference is one of the clearest ways dog teeth vs cat teeth diverge, and it affects how much surface area there is for tartar to build up.
Are dog teeth stronger than cat teeth?
Not in a meaningful way for owners. Both species have enamel, dentin, and pulp in the same basic arrangement. What differs is shape and function, not overall durability.
Why do cats have sharper teeth than dogs?
Cats are built to shear meat, so their teeth are thinner and more blade-like. Dogs have more crushing surface for their broader diet. This is a normal carnivore difference, not a sign of health or disease.
Should I brush my cat's teeth the same way I brush my dog's?
The technique is similar, but cats usually need a smaller brush and more patience. Start slowly, use pet-safe toothpaste, and reward calm behavior. If your cat will not tolerate brushing, ask your vet about other options.
Can my pet's teeth tell me their age?
Sometimes, but not reliably. Veterinarians can estimate age from wear patterns in many large adult dogs, but this is harder in small and toy breeds. In cats, age estimation from teeth is even less precise.
What if my pet has a baby tooth that never fell out?
That is called a persistent deciduous tooth, and it is a common reason for extraction. Your veterinarian can check whether it is affecting the adult tooth and recommend the right timing for removal.
How often should my pet have a professional dental exam?
Ask your veterinarian, since the schedule depends on your pet's age, breed, and current dental health. Many pets need an exam at least once a year, and some need more frequent checks.
Related Articles
- Dental Radiography Positioning and Interpretation in Dogs and Cats
- Dental Disease In Dogs And Cats
- What Is a Dental Cleaning for Dogs and Cats? What to Expect
- Dental Care for Dogs and Cats: Home Brushing, Professional Cleaning, and Prevention
- Fecal Exams for Dogs and Cats: Why They Matter and How Often
- Prevent Dental Problems In Cats
References
- Dental Development of Cats - Cat Owners. Merck Veterinary Manual.
- Dental Development of Dogs - Dog Owners. Merck Veterinary Manual.
- Dentition and Dental Nomenclature of Animals - Digestive System. Merck Veterinary Manual.
- Species- and breed-associated heterogeneity in age-related increases in periodontal disease risk among dogs and cats based on Japanese insurance claim data. Frontiers in veterinary science, 2026.
- Morphological quantification of the maxillary canine tooth in the domestic dog (Canis lupus familiaris). Annals of anatomy = Anatomischer Anzeiger : official organ of the Anatomische Gesellschaft, 2023.
- Malocclusion in cats associated with mandibular soft tissue trauma: a retrospective case-control study. Journal of feline medicine and surgery, 2023.
- Relationship between tooth macrowear and jaw morphofunctional traits in representative hypercarnivores. PeerJ, 2024.
- Closed Extraction of Deciduous Canine Teeth Required Less Surgical Time Without Increased Complication Rate Compared to an Open Technique in Dogs and Cats. Journal of veterinary dentistry, 2026.