How Many Teeth Do Dogs Have? Canine Dental Health & Safe...
How many teeth do dogs have? Discover puppy vs adult tooth counts, teething timelines, dental disease signs, and which human foods are safe or risky for canine teeth.
The Short Answer: Puppies Have 28 Teeth, Adults Have 42
If you've ever wondered how many teeth do dogs have, the answer depends on their life stage. Adult dogs have 10 more teeth than humans (who typically have 32), and those extra teeth are specialized for tearing, shearing, and crushing. This matters enormously when you're deciding what human foods, bones, or dental chews to offer — because the wrong texture or size can fracture a carnassial tooth or lodge between molars, triggering painful abscesses.
According to the American Veterinary Medical Association (AVMA), over 80% of dogs show signs of periodontal disease by age three. Knowing your dog's dental blueprint helps you protect those 42 teeth for life.
Puppy Teeth vs. Adult Teeth: The Full Timeline
Dogs go through two complete sets of teeth, much like humans — but the timeline is compressed into their first seven months of life.
| Age | Tooth Type | Count | What's Happening |
|---|---|---|---|
| 3–5 weeks | Deciduous (baby) | 28 | Incisors and canines erupt first; puppies begin nursing with teeth |
| 4–6 weeks | Deciduous | 28 | Premolars erupt; full puppy set complete |
| 3–4 months | Transitional | 28 → 42 | Adult incisors push out baby incisors; you may find tiny teeth on the floor |
| 4–5 months | Transitional | ~34 | Canines and premolars replace; increased chewing behavior |
| 5–7 months | Adult (permanent) | 42 | Molars erupt in back; full adult dentition complete |
Key detail many owners miss: Puppies do NOT have molars in their baby set. The four molars on each side of the lower jaw and two on each side of the upper jaw only appear in the adult dentition. If your 6-month-old puppy seems to be chewing aggressively, they're likely working those new molars through the gums.
The 42-Tooth Breakdown: What Each Tooth Does
Adult dogs have a precise dental formula that reflects their evolutionary role as carnivores who process whole prey. Here's the exact count by tooth type:
| Tooth Type | Upper Jaw | Lower Jaw | Total | Function |
|---|---|---|---|---|
| Incisors | 6 | 6 | 12 | Gripping, nibbling, grooming |
| Canines | 2 | 2 | 4 | Puncturing, holding, tearing |
| Premolars | 8 | 8 | 16 | Shearing, shredding food |
| Molars | 4 | 6 | 10 | Crushing, grinding hard material |
| Total | 20 | 22 | 42 | — |
The carnassial teeth — the upper fourth premolar and lower first molar — are the most clinically significant. These act like scissors, sliding past each other to shear meat and crack bone. They're also the teeth most commonly fractured when dogs chew on objects harder than their enamel. A fractured carnassial tooth often requires surgical extraction, which costs $800–$2,500 per tooth at a veterinary dental specialist in 2026.
Safe Human Foods for Dogs: What's Good (and Bad) for Those 42 Teeth
Understanding dental anatomy directly informs which human foods are safe to share. Foods that are too hard fracture teeth; foods that are too sticky promote plaque; and small, round foods can lodge between premolars.
Teeth-Safe Human Foods
- Carrots (raw, large pieces): The crunch helps scrape plaque from premolars. Cut into chunks larger than your dog's mouth width to prevent choking. Rich in beta-carotene (converted to vitamin A), fiber (2.8g per 100g), and potassium (320mg per 100g per USDA FoodData Central).
- Apple slices (cored, seedless): Firm texture cleans incisors. Remove all seeds — they contain amygdalin, which releases cyanide. One medium apple provides 4.4g fiber and 14% daily vitamin C (human reference).
- Cooked sweet potato (cooled, chunked): Soft enough to avoid fractures, sticky enough to pull debris from molars. High in vitamin A (14,187 IU per 100g baked) and manganese.
- Celery sticks (cut into 2-inch pieces): Fibrous strings act like natural floss between premolars. Low calorie (14 kcal per 100g), high water content.
Foods That Risk Dental Damage
- Cooked bones (all types): Cooking makes bones brittle. They splinter into shards that fracture canines and lodge between molars. The FDA explicitly warns against feeding cooked bones to dogs.
- Ice cubes (for aggressive chewers): While some dogs handle ice fine, power chewers can crack upper premolars on frozen cubes. If your dog crunches ice aggressively, switch to crushed ice or chilled water.
- Hard candy, popcorn kernels, corn on the cob: Dense enough to fracture carnassial teeth. Corn cobs also pose a severe intestinal blockage risk.
- Weight-bearing bones from large animals (raw or cooked): Femur and knuckle bones from cattle are harder than canine enamel (enamel hardness: ~350 Vickers; cortical bone: ~300–400 Vickers). The margin is too thin for safe chewing.
Serving Sizes: Safe Chews and Foods by Dog Weight
Even teeth-safe foods become dangerous when portions are wrong. Here's a weight-based guide for dental-friendly human food treats:
| Dog Weight | Raw Carrot | Apple Slices | Cooked Sweet Potato | Celery |
|---|---|---|---|---|
| Under 15 lb (7 kg) | 1 baby carrot or ½-inch slice | 2–3 thin slices | 1 tablespoon, mashed | 1 small piece (1 inch) |
| 15–40 lb (7–18 kg) | 1 medium carrot, halved | 4–6 slices | 2–3 tablespoons, chunked | 2 pieces (2 inches each) |
| 40–80 lb (18–36 kg) | 1 large carrot, whole | ½ apple, sliced | ¼ cup, chunked | 3–4 pieces (2 inches each) |
| Over 80 lb (36+ kg) | 1–2 large carrots | ½–1 apple, sliced | ⅓ cup, chunked | 4–5 pieces (2 inches each) |
The 10% rule: All treats and human foods combined should never exceed 10% of your dog's daily caloric intake. For a 30 lb dog eating 700 kcal/day, that's 70 kcal maximum from treats — roughly one medium carrot (25 kcal) plus a few apple slices (15 kcal).
Preparation Requirements for Dental Safety
- Wash all produce thoroughly — pesticide residue concentrates on skins. Use a 1:3 vinegar-to-water soak for 5 minutes, then rinse.
- Remove all seeds, pits, and cores — apple seeds, cherry pits, and peach stones contain cyanogenic glycosides. Discard immediately; don't leave within reach.
- Cut to appropriate size — pieces should be large enough that your dog must chew (not inhale) but small enough that a single piece won't block the airway. Rule of thumb: no smaller than a golf ball for dogs under 30 lb; no smaller than a tennis ball for larger dogs if feeding whole items like carrot sticks.
- Cook hard vegetables for seniors or puppies — steam carrots or sweet potato until fork-tender if your dog is under 7 months (developing teeth) or over 8 years (potential dental weakness).
- Never add seasoning — no salt, garlic powder, onion powder, or butter. Garlic and onion are toxic to dogs (causing hemolytic anemia at doses above 15–30g/kg body weight).
- Supervise all chewing sessions — stay present when your dog is working through any chew item. If they gulp large pieces, the item is too small or too soft.
Dental Disease Signs Every Owner Should Recognize
With 42 teeth packed into a relatively small jaw, dogs are prone to crowding, plaque buildup, and periodontal disease. The Merck Veterinary Manual identifies these progressive stages:
- Stage 1 — Gingivitis: Red, swollen gumline. Reversible with professional cleaning. Often first noticed as "doggy breath" that's stronger than usual.
- Stage 2 — Early periodontitis: Tartar (calculus) visible as brown-yellow crust on premolars and canines. Gums may bleed when your dog chews a carrot or toy. 15–25% bone attachment loss.
- Stage 3 — Moderate periodontitis: Gums recede visibly. Teeth may appear "longer." Bad breath becomes noticeable across a room. 25–50% bone loss. Extraction may be needed for some teeth.
- Stage 4 — Advanced periodontitis: Teeth are loose or missing. Jawbone can fracture from weakened structure (especially in small breeds like Chihuahuas and Yorkshire Terriers). Systemic bacteria can seed the heart valves, kidneys, and liver.
- Your dog drops food while eating or chews only on one side
- Visible swelling under the eye (tooth root abscess of upper premolar)
- Pawing at the mouth combined with reluctance to eat
- A broken or discolored (gray/purple) tooth
- Bleeding from the mouth lasting more than 5 minutes
- Sudden drooling that's out of character
These are not "wait and see" symptoms. Tooth root abscesses and fractures expose the pulp cavity to oral bacteria, causing intense pain your dog will try to hide. Call your vet or an emergency clinic immediately.
When NOT to Offer Hard Chews or Crunchy Foods
Even teeth-safe foods require context. Skip raw carrots, celery, and hard chews entirely in these situations:
- Puppies under 4 months: Baby teeth are thinner and more fragile. Offer only soft, mashed foods until adult canines are fully erupted.
- Senior dogs (8+ years) without recent dental work: If your older dog hasn't had a veterinary dental exam in 12+ months, assume some teeth are compromised. Steam all vegetables until soft.
- Dogs with known periodontal disease: If your vet has identified Stage 2+ disease, hard chews can accelerate tooth loss. Stick to soft treats until after professional cleaning and any extractions.
- Post-dental-surgery recovery (14–21 days): After extractions or professional cleaning, feed only soft food. Raw carrots can disrupt healing sockets.
- Brachycephalic breeds (Pugs, Bulldogs, Boston Terriers): Their 42 teeth are crammed into a shortened jaw, causing severe crowding and rotated teeth. Food lodges easily in abnormal spaces. Daily tooth brushing is non-negotiable for these breeds.
How to Introduce New Dental-Safe Foods
Start with a single food item at a single serving size from the table above. Feed it in the morning so you have a full day to observe. Monitor for 24–48 hours for:
- Loose stool or diarrhea (too much fiber introduced too quickly)
- Vomiting within 2 hours of eating (possible intolerance)
- Excessive scratching, ear rubbing, or paw licking (food allergy — uncommon with vegetables but possible)
- Reluctance to eat the next meal (oral discomfort from chewing)
If all is well after 48 hours, you can introduce a second new food using the same protocol. Once you've identified 3–4 safe options, rotate them to provide nutritional variety and prevent flavor fatigue.
Frequently Asked Questions
Do all dogs have exactly 42 teeth?
Most do, but some dogs are born with missing teeth (hypodontia) or extra teeth (supernumerary teeth). Small breeds — especially Chihuahuas, Pomeranians, and Toy Poodles — commonly have fewer than 42 due to genetic crowding. Dogs with retained baby teeth (where the adult tooth erupts alongside the baby tooth rather than pushing it out) effectively have more than 42 temporarily, but the retained baby teeth must be extracted to prevent misalignment and decay.
Why does my dog have 42 teeth but my cat only has 30?
Cats are obligate carnivores with a simpler dental formula optimized for shearing meat — they don't need grinding molars for plant material. Dogs, as facultative carnivores, evolved a more versatile dentition that includes crushing molars for bones, cartilage, and some plant matter. The extra 12 teeth in dogs are primarily premolars and molars.
Can I brush my dog's 42 teeth at home?
Yes — and you should. Daily brushing with a veterinary-formulated enzymatic toothpaste (never human toothpaste, which contains xylitol or fluoride, both toxic to dogs) is the single most effective way to prevent periodontal disease. Use a dual-head canine toothbrush or a finger brush. Focus on the outer surfaces of the upper premolars and canines, where plaque accumulates fastest. A complete brushing should take 30–60 seconds.
My dog lost a tooth — will it grow back?
Only if your dog is under 7 months and it's a deciduous (baby) tooth. Once adult teeth are lost, they do not regenerate. A lost adult tooth signals either advanced periodontal disease, trauma, or a resorptive lesion. See your vet — the empty socket can become infected, and adjacent teeth may destabilize.
Are dental chews as effective as brushing?
No. Dental chews (look for the Veterinary Oral Health Council — VOHC — seal of approval) reduce tartar by approximately 15–30% compared to no intervention, but brushing removes plaque before it mineralizes into tartar. Think of dental chews as supplemental, not a replacement. The most effective protocol combines daily brushing + VOHC-approved chews + annual professional cleanings under anesthesia.
What should I do if my dog swallows a tooth?
Swallowed teeth usually pass through the GI tract within 24–72 hours without issue. Monitor for vomiting, straining to defecate, or blood in stool. If these occur, contact your vet. The bigger concern is why the tooth was lost — schedule a dental exam to assess the remaining 41 (or fewer) teeth.
Anouk Beaumont
All our authors care for dogs every day — read more of their work on the authors page.
