Kitten Teeth vs Adult Teeth: Feline Dental Timeline
By Dr. Zubair Khalid, DVM, MS, PhD ·
Kittens start with 26 baby teeth and finish with 30 adult teeth, and the whole swap takes roughly the first 6 to 7 months of life [1]. Knowing what happens when helps you tell ordinary teething from a problem that needs a veterinarian. This article is educational and is not a substitute for veterinary diagnosis or treatment.
Quick Answer
- Kittens have 26 deciduous (baby) teeth, and adult cats have 30 permanent teeth [1].
- Baby incisors erupt around 2 to 4 weeks of age, and baby premolars around 5 to 6 weeks [1].
- Permanent teeth begin coming in at about 4 to 7 months of age [1].
- Loose teeth, drooling, and chewing on things are normal during the swap. Broken teeth, bad breath, and trouble eating are not.
- Start home dental care early and ask your vet about a first oral exam, because gum disease starts with plaque below the gum line and needs a professional cleaning under anesthesia to treat [2].
The Cat Teeth Kitten to Adult Timeline, Step by Step
Weeks 2 to 6: The baby teeth arrive
A kitten is born with no visible teeth. The deciduous incisors, the small front teeth, begin to erupt at 2 to 4 weeks of age [1]. The deciduous premolars, the larger cheek teeth, follow at 5 to 6 weeks [1]. By about 6 to 8 weeks, most kittens have their full set of 26 baby teeth [1].
These teeth are tiny, sharp, and temporary. They are built for a meat-eating animal, which is why a cat's teeth look nothing like a horse's grinding teeth [1]. The shape matters because it tells you what each tooth is for. The canines (fangs) grip prey, and the premolars shear meat.
Months 3 to 7: Baby teeth fall out, adult teeth come in
This is the phase owners notice most. The permanent teeth usually begin to appear at around 4 to 7 months of age [1]. The incisors often come in first, then the canines, then the premolars and molars. By the end of this window, your cat should have 30 adult teeth [1].
You may find a tiny tooth on the floor or in a toy. That is normal. You may also find nothing at all, because many kittens swallow their baby teeth while eating. Either way is fine.
What changes during the swap
The most obvious sign is chewing. Kittens chew on fingers, cords, shoelaces, and furniture because their gums feel sore and itchy as teeth move. Some kittens drool a little or eat more slowly for a few days. Mild gum redness around a loosening tooth is common.
What you should not see is a kitten who stops eating, cries when chewing, or has a swollen face. Those point to a problem, not normal teething.
Kitten Teeth vs Adult Teeth: A Comparison Table
| Feature | Kitten (deciduous) teeth | Adult (permanent) teeth |
|---|---|---|
| Total number | 26 [1] | 30 [1] |
| When they appear | Incisors at 2 to 4 weeks, premolars at 5 to 6 weeks [1] | Around 4 to 7 months [1] |
| Size and shape | Smaller, thinner, sharper | Larger, sturdier, fully rooted |
| Purpose | Temporary set for a growing jaw | Permanent set for life |
| Care needs | Gentle wiping, early brushing | Daily brushing plus professional cleanings [2] |
The count difference surprises many owners. Four extra teeth show up in the adult set, mostly premolars and molars at the back of the mouth. Those back teeth are the ones that collect plaque and tartar, so they deserve attention even though you can barely see them.
A Simple Checklist by Age
2 to 4 weeks: Look for the first incisors. Do not pry the mouth open. A quick peek while the kitten yawns is enough.
5 to 8 weeks: Count what you can see. Expect baby premolars. This is a good time for the first vet visit, which usually includes an oral check.
3 to 4 months: Watch for loose teeth and chewing. Offer safe chew toys. Start touching the gums and lips so your kitten gets used to handling.
4 to 7 months: Adult teeth arrive [1]. Check for baby teeth that stay in place next to an adult tooth. This is called a persistent deciduous tooth, and it is the most common reason deciduous canine teeth get extracted [3].
6 to 8 months: Most kittens have a full adult set [1]. Ask your vet to check the bite and the back teeth.
1 year and beyond: Move into a daily home care routine. Gum disease is caused by bacteria in plaque at and below the gum line, and it can lead to tooth loss if untreated [2].
Supplies and Setup That Actually Matter
You do not need much, but the right items make a difference.
A cat toothbrush or finger brush. A soft brush sized for a small mouth works better than a human brush.
Pet toothpaste. Never use human toothpaste. Cats cannot spit, and the ingredients are not meant to be swallowed.
Safe chew items. Choose toys without small parts that can break off. Avoid hard objects that could fracture a tooth.
A light source. A small flashlight helps you see the back teeth and check for redness or tartar.
A written record. Note the date you first see each new tooth or any lost tooth. Your vet can use that history.
Diet plays a role too. In one study, cats fed a dry diet had less tooth calculus coverage and thickness than cats fed a wet diet, and gingivitis scores were higher in the wet-diet group [4]. That does not mean wet food is bad. It means texture affects plaque buildup, so talk with your vet about what fits your cat.
Signs Something Is Wrong
Teething is mild. Dental disease is not. Watch for these signs and act on them.
Bad breath that does not go away. This often means plaque and bacteria are building up. Gum disease is infection and inflammation of the tissue around the teeth, caused by bacteria accumulating at and below the gum line [2].
Red, swollen, or bleeding gums. Gingivitis is the early form of periodontal disease, and it needs a professional cleaning under anesthesia to treat the cause [2]. Cleanings done without anesthesia may make the tooth look better but do not treat the plaque below the gum line [2].
A baby tooth that will not fall out. Persistent deciduous teeth are common and often need extraction [3]. If a baby canine stays next to the adult canine, the two teeth crowd each other and trap food.
A broken tooth. A fractured tooth that exposes the pulp is painful. In a review of deciduous canine extractions, 20 of 305 teeth (6.6%) were removed because of a fracture that exposed the pulp [3]. Immature permanent teeth with crown fractures are especially concerning because the dentin walls are thin and the root is not fully formed, so preserving the pulp matters for continued development [5].
Teeth that do not line up. Malocclusion can cause the upper or lower teeth to traumatize the soft tissues of the mouth [6]. Your vet can assess the bite during an exam.
Missing teeth beyond the normal timeline. Rare congenital conditions exist. One case report described a cat with only two deciduous upper canines and no permanent teeth at all [7]. This is uncommon, but it shows why a full oral exam matters.
Drooling, pawing at the mouth, or dropping food. These are pain signals. Cats hide oral pain well, so any change in eating deserves a look.
Common Mistakes Owners Make
Waiting for the adult teeth before starting dental care. Plaque starts forming early. Getting your kitten used to mouth handling at 3 to 4 months makes adult brushing far easier. See Home Dental Care for Cats: Brushing Alternatives and Dental Treats for options if your cat refuses a brush.
Pulling a loose baby tooth. Do not do this. A retained tooth may need a closed or open extraction technique performed by a veterinarian, and the choice depends on the tooth and the mouth [3].
Assuming bad breath is normal. It is common, but common is not the same as healthy. Gum disease is one of the most frequently encountered oral problems in cats [8].
Skipping the back teeth. The molars and premolars collect the most tartar. If you only brush the fangs, you miss the teeth most likely to cause trouble.
Using human dental products. Human toothpaste and mouthwash are not made for cats.
Ignoring diet and water intake. Diet texture affects calculus and gingivitis scores [4]. Ask your vet what to feed based on your cat's age and mouth.
Thinking anesthesia-free cleaning is enough. It is not. The underlying problem is plaque below the gum line, and treating it requires anesthesia [2]. The 2025 FelineVMA guidelines also note that anesthesia is an essential part of feline dentistry and that pain management is standard for cats with oral disease [8].
Building a Prevention Routine Early
Once the adult teeth are in, aim for daily brushing. If daily is not realistic, do what you can and keep it consistent. Pair brushing with a reward so your cat associates mouth handling with something good.
Ask your vet about professional cleanings. The timing depends on your cat's plaque, tartar, and gum health. Some cats need cleanings more often than others. Your vet may also recommend dental radiographs, since much of the tooth sits below the gum line where you cannot see it. For more on that, see Dental Radiography Positioning and Interpretation in Dogs and Cats.
For a broader prevention plan, Prevent Dental Problems In Cats walks through the habits that protect teeth over a lifetime.
Limitations and When to Contact a Veterinarian
This article covers the typical timeline. Every kitten is an individual, and some teeth come in earlier or later than the ranges above. Only a veterinarian who examines your cat can tell you whether what you are seeing is normal for your pet.
Contact your veterinarian the same day if you see:
- A swollen face, eye, or jaw
- A broken tooth with a visible pink or red center
- Drooling that started suddenly, or a cat who will not eat
- Bleeding from the mouth that does not stop
- A baby tooth still in place next to an adult tooth after 7 months
Go to an emergency clinic now if you see:
- Trouble breathing along with mouth swelling
- A jaw that looks broken or hangs open
- Collapse, severe weakness, or a cat who cannot swallow
Schedule a routine visit if you see:
- Bad breath that has lasted more than a few days
- Yellow or brown buildup on the teeth
- Red or puffy gums
- Any missing tooth you did not expect
Frequently Asked Questions
How many teeth do kittens have?
Kittens have 26 deciduous teeth, and adult cats have 30 permanent teeth [1]. The four extra teeth in the adult set are mostly at the back of the mouth. That is why the back teeth deserve extra attention during brushing.
When do kittens lose baby teeth?
The swap usually happens between about 4 and 7 months of age, when the permanent teeth start to appear [1]. You may never see a lost tooth because many kittens swallow them. Loose teeth and extra chewing are the signs most owners notice.
Is it normal for my kitten to chew on everything?
Yes, chewing is common while the gums are sore and the teeth are shifting. Offer safe chew toys and redirect your kitten away from cords and fingers. If chewing comes with drooling, crying, or refusing food, call your vet.
Do kittens need their teeth brushed?
Yes, starting early makes adult care easier. Gum disease is caused by bacteria in plaque at and below the gum line, and it can lead to tooth loss if untreated [2]. Daily brushing plus professional cleanings under anesthesia is the standard approach [2][8].
What if a baby tooth never falls out?
A retained baby tooth, called a persistent deciduous tooth, is the most common reason deciduous canine teeth are extracted [3]. Your vet will check the bite and decide whether removal is needed. Do not try to pull it yourself.
Can teething cause diarrhea or fever in kittens?
Teething itself does not typically cause those signs. Diarrhea, fever, and lethargy point to another problem, such as infection or parasites. Have your kitten seen by a veterinarian if these appear.
Related Articles
- Prevent Dental Problems In Cats
- Home Dental Care for Cats: Brushing Alternatives and Dental Treats
- How To Prevent Dental Problems In Cats
- How to Brush Your Cat's Teeth: A Step-by-Step Guide for Seniors
- Dental Radiography Positioning and Interpretation in Dogs and Cats
- Cat Dental Cleaning Risks
References
- Dental Development of Cats - Cat Owners. Merck Veterinary Manual.
- Dental Disorders of Cats - Cat Owners. Merck Veterinary Manual.
- 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.
- Oral health indices and microbiota populations of adult cats consuming wet or dry diets. Frontiers in veterinary science, 2025.
- Decision-Making and Management of Immature Permanent Teeth with Crown Fractures in Small Animals-A Review. Journal of veterinary dentistry, 2021.
- Malocclusion in cats associated with mandibular soft tissue trauma: a retrospective case-control study. Journal of feline medicine and surgery, 2023.
- Congenital oligodontia of the deciduous teeth and anodontia of the permanent teeth in a cat. Journal of feline medicine and surgery, 2009.
- 2025 FelineVMA feline oral health and dental care guidelines. Journal of feline medicine and surgery, 2025.