Lose Baby Teeth?
Do dogs lose baby teeth? Yes — puppies lose all 28 deciduous teeth by 6 months. Learn the science, timeline, breed variations, and when to see a vet.
Quick Answer: Do Dogs Lose Baby Teeth?
Yes, all dogs lose their baby teeth. Puppies are born toothless, develop 28 deciduous (baby) teeth by 6–8 weeks of age, and then lose every single one as 42 permanent adult teeth erupt between roughly 12 weeks and 6 months. The entire process is called teething, and it is a normal, universal developmental milestone in dogs — just as it is in humans. If your puppy still has baby teeth beyond 7 months of age, that signals a retained deciduous tooth and warrants a veterinary evaluation.
If you have found a tiny, rice-grain-sized tooth on the floor or noticed your puppy chewing everything in sight, you are witnessing one of the most significant physiological transitions in canine development. Understanding the science behind puppy teething — the evolutionary reasons it exists, the cellular mechanisms that drive it, and the breed-specific variations — will help you navigate this sometimes-uncomfortable stage with confidence.
The Science of Deciduous and Permanent Dentition in Dogs
How Puppy Teeth Develop and Fall Out
Dogs are diphyodont, meaning they develop two successive sets of teeth over their lifetime — a trait shared with humans and most other mammals. The first set, called deciduous or "milk" teeth, begins forming in the jaw before birth. By the time a puppy is 3–6 weeks old, all 28 deciduous teeth have erupted through the gums.
The physiological mechanism behind tooth loss is driven by osteoclast activity — specialized cells that resorb (dissolve) the roots of the baby teeth as the permanent teeth develop beneath them in the jawbone. As the adult tooth pushes upward, the osteoclasts break down the deciduous tooth root, leaving only the crown, which eventually loosens and falls out. This is why you may find puppy teeth with little to no root structure attached — the root has been almost entirely resorbed.
According to the Merck Veterinary Manual, the permanent teeth develop from separate tooth buds located deeper in the jaw. Each permanent tooth follows its own eruption timeline, and the pressure of the growing adult tooth is what triggers the osteoclast-mediated root resorption of the overlying deciduous tooth.
Why Do Dogs Have Baby Teeth at All?
The evolutionary basis for deciduous teeth traces back to early mammalian ancestors. In wolves and wild canids, baby teeth serve a critical survival function: they allow nursing puppies to begin processing semi-solid food regurgitated by their mother as early as 3–4 weeks of age, accelerating the weaning process. Sharp, needle-like deciduous incisors and canines help puppies grasp and tear soft food while their jaws are still too small to accommodate the larger, more complex adult dentition.
Evolutionary Context: From Wolf Pups to Modern Puppies
In ancestral wolves, rapid weaning was essential for pack survival. A nursing mother expends enormous caloric energy, and the sooner pups could eat pre-chewed meat, the sooner she could return to hunting. Deciduous teeth evolved as a bridge — sharp enough to process soft food, but designed to be replaced by the robust, multi-cusped adult teeth needed for shearing bone and hide. Modern domestic dogs retain this ancestral program, even though we feed them kibble and canned food. The genetic instructions for diphyodont tooth development are deeply conserved across canid species, regulated by signaling pathways including BMP (bone morphogenetic protein) and FGF (fibroblast growth factor) gene families.
The Puppy Teething Timeline: Week by Week
Understanding the precise timeline helps you anticipate changes and distinguish normal development from potential problems. Here is the standard progression based on veterinary dental references from the American Veterinary Dental College:
| Age | Event | Details |
|---|---|---|
| Birth – 2 weeks | No teeth | Puppies nurse using tongue and palate suction; tooth buds developing beneath gums |
| 3–5 weeks | Deciduous incisors erupt | 6 upper and 6 lower incisors appear first; puppy may begin nibbling |
| 3–5 weeks | Deciduous canines erupt | 4 needle-sharp canine teeth (fangs) emerge; biting pressure increases |
| 4–6 weeks | Deciduous premolars erupt | 12 premolars complete the set of 28 baby teeth; no deciduous molars |
| 6–8 weeks | Full deciduous set | All 28 baby teeth present; puppy has maximum "needle mouth" sharpness |
| 12–16 weeks | Deciduous incisors shed | Permanent incisors push out baby incisors; you may find tiny teeth on the floor |
| 12–16 weeks | Permanent canines begin erupting | Adult canines emerge alongside remaining baby canines temporarily |
| 16–24 weeks | Premolars and molars erupt | Permanent premolars replace deciduous ones; 4 true molars (not present as baby teeth) erupt in the back |
| 5–7 months | Full adult dentition | All 42 permanent teeth should be in place; veterinary dental check recommended |
How Is Puppy Teething Different from Human Baby Teeth?
While both dogs and humans are diphyodont, there are important differences in timing, tooth count, and mechanism:
| Feature | Dogs | Humans |
|---|---|---|
| Deciduous teeth count | 28 | 20 |
| Adult teeth count | 42 | 32 (including wisdom teeth) |
| First eruption (baby) | 3–5 weeks | 6–10 months |
| Baby teeth fully shed by | 6–7 months | 12 years |
| Entire process duration | ~5–6 months | ~11–12 years |
| Root resorption mechanism | Osteoclast-driven (same) | Osteoclast-driven (same) |
The compressed timeline in dogs reflects their faster overall maturation. A 6-month-old dog is roughly equivalent in developmental stage to a 10-year-old human child — who would still have many baby teeth. Dogs simply grow up faster, and their dental development mirrors that accelerated growth.
What Does It Mean When My Puppy Is Chewing Everything?
During the teething window (roughly 12 weeks to 6 months), puppies exhibit dramatically increased chewing behavior. This is not random destruction — it serves a physiological purpose. Chewing applies mechanical pressure to the gums, which:
- Stimulates blood flow to the gingival tissues, supporting the inflammatory processes needed for tooth eruption
- Helps loosen deciduous crowns that have separated from their resorbed roots
- Provides counter-pressure relief from the discomfort of adult teeth pushing through bone and soft tissue
The discomfort of teething is real. The gums become inflamed, may bleed slightly, and the puppy experiences a dull, persistent ache similar to what human toddlers feel. This is why puppies seek out firm, textured objects to gnaw on. Providing appropriate outlets is essential.
Practical Teething Management for Owners
- Freeze a damp washcloth: Twist a clean washcloth into a rope, soak in water, freeze for 2–3 hours, and let your puppy chew. The cold numbs gums and the texture satisfies the chewing urge. Replace when thawed.
- Offer veterinary-recommended chew toys: Look for toys rated for "power chewers" — brands like Kong (Classic or Puppy models, $8–$15) and Nylabone Puppy Chew ($5–$9) are designed to flex under pressure without splintering. Avoid hard nylon or antlers during teething, as developing teeth are more susceptible to fracture.
- Puppy-proof your home: Between 12–24 weeks, assume everything within 18 inches of the floor is a target. Use bitter apple spray ($7–$12 per bottle) on baseboards and furniture legs, and keep shoes, cords, and children's toys in closed containers.
- Rotate toys every 3–4 days: Puppies habituate quickly. A rotation of 4–6 different textures (rubber, rope, soft plush, ridged nylon) keeps them engaged and reduces furniture chewing by an estimated 40–60% based on owner reports.
- Never punish chewing: Redirect to an appropriate item and reward with praise or a small treat. Force-free redirection builds the "chew this, not that" habit without creating fear.
Breed Variations in Teething: Size Matters
Not all puppies follow the standard timeline. Research in veterinary dentistry has documented consistent breed-size variations:
| Size Category | Example Breeds | Baby Teeth Erupt | Adult Teeth Complete | Retained Tooth Risk |
|---|---|---|---|---|
| Toy breeds (under 12 lb / 5 kg) | Chihuahua, Yorkshire Terrier, Pomeranian | 4–6 weeks (slightly delayed) | 7–8 months (delayed) | High — up to 40% of toy breeds retain at least one deciduous tooth |
| Small breeds (12–25 lb / 5–11 kg) | Beagle, French Bulldog, Cocker Spaniel | 3–5 weeks | 6–7 months | Moderate — brachycephalic breeds at higher risk due to jaw crowding |
| Medium breeds (25–60 lb / 11–27 kg) | Border Collie, Australian Shepherd, Bulldog | 3–5 weeks | 5–6 months | Low–Moderate |
| Large breeds (60–100 lb / 27–45 kg) | Labrador Retriever, Golden Retriever, German Shepherd | 3–4 weeks (slightly earlier) | 5–6 months | Low |
| Giant breeds (100+ lb / 45+ kg) | Great Dane, Saint Bernard, Mastiff | 3–4 weeks | 5–6 months (sometimes earlier) | Low |
The higher retained-tooth risk in toy breeds is well-documented. Their small jaws simply have less space, and the adult tooth bud may not align directly beneath the baby tooth, failing to trigger complete root resorption. Brachycephalic breeds (short-nosed dogs like French Bulldogs and Pugs) face similar crowding issues because their shortened maxilla compresses tooth positions. If you own a toy or brachycephalic breed, schedule a dental evaluation with your veterinarian at the 6-month mark specifically to check for retained deciduous teeth.
When Retained Baby Teeth Signal a Problem
A retained deciduous tooth occurs when the baby tooth fails to fall out after the permanent tooth has erupted alongside it. This is the most common dental abnormality in puppies, and it is not something to ignore. When a baby tooth and adult tooth occupy the same position, several problems develop:
- Malocclusion: The adult tooth is deflected into an abnormal position, potentially damaging the opposing gum or palate
- Periodontal disease: Food and bacteria become trapped between the two teeth, accelerating plaque buildup and gum inflammation — sometimes within weeks
- Root damage: Crowded roots can resorb each other or become infected
When to See Your Veterinarian About Puppy Teeth
Contact your vet promptly if you observe any of the following:
- Both a baby tooth and an adult tooth visible in the same position ("double fang" or "shark teeth" appearance) lasting more than 1–2 weeks
- No baby teeth have fallen out by 5 months of age
- Swelling, pus, or a foul odor from the mouth
- Your puppy is reluctant to eat, drops food, or cries when chewing
- Bleeding that persists for more than 24 hours after a tooth falls out
- The puppy seems to be in significant pain (pawing at mouth, refusing toys, lethargy)
Consult your veterinarian for any retained deciduous tooth. Extraction under general anesthesia is a routine procedure (typical cost: $150–$400 per tooth depending on your region and whether dental radiographs are included), and early removal prevents lifelong orthodontic and periodontal complications.
Common Teething Myths vs. Facts
| Myth | Fact |
|---|---|
| "Puppies swallow their baby teeth and it's dangerous" | Most swallowed baby teeth pass through the digestive tract without issue. The teeth are small (3–5 mm) and are routinely broken down by stomach acid. Finding teeth on the floor is actually less common than you might think — most puppies swallow them during play or eating. |
| "You should pull loose baby teeth yourself" | Never pull a puppy's tooth. If the root has not fully resorbed, you risk fracturing the tooth and leaving root fragments that can become infected. Only a veterinarian should extract teeth, using proper anesthesia and dental radiographs to confirm complete removal. |
| "Teething causes diarrhea and fever" | While mild gingival inflammation is normal, systemic symptoms like diarrhea, fever (over 102.5°F / 39.2°C), or vomiting are NOT caused by teething. These indicate illness and require veterinary attention. Coincidental timing with common puppy infections (parvovirus, parasites) creates this false association. |
| "Hard bones are good for teething puppies" | Hard objects (antlers, weight-bearing bones, hard nylon) can fracture developing teeth. Puppy teeth have thinner enamel and larger pulp chambers than adult teeth, making them more vulnerable. Stick to veterinary-approved puppy-specific chews with some flex. |
| "If I don't find teeth on the floor, something is wrong" | Most puppies swallow their deciduous teeth. The absence of found teeth is completely normal. What matters is that the adult teeth are erupting in the correct positions — your vet can confirm this during a wellness exam. |
Related Dental Milestones and Care
Teething is part of a broader dental health journey. Here are cross-referenced milestones and practices that connect to this developmental stage:
- Toothbrush training (8–12 weeks): Begin handling your puppy's mouth gently before teething starts. Touch the gums, lift the lips, and reward with treats. By the time adult teeth are in, your dog will tolerate brushing. Use a veterinary-formulated enzymatic toothpaste ($8–$14, brands like CET or Virbac) — never human toothpaste, which contains xylitol or fluoride that is toxic to dogs.
- First dental radiographs: Many veterinarians recommend baseline dental X-rays during the spay/neuter procedure (typically 6 months), which coincides with the completion of adult tooth eruption. This establishes a baseline for future comparison. Cost: $100–$250 added to the surgical fee.
- Dental chews and VOHC approval: Once adult teeth are fully in (after 7 months), look for dental chews with Veterinary Oral Health Council (VOHC) certification, which verifies plaque and tartar reduction through controlled testing. Greenies, Oravet, and Purina Dentalife all carry VOHC seals.
- Breed-specific dental risk awareness: Small and toy breeds are predisposed to periodontal disease starting as early as 2–3 years of age due to tooth crowding. Understanding the teething stage helps you anticipate and prevent long-term problems.
Frequently Asked Questions
Can dogs keep any of their baby teeth?
No — in normal development, all 28 deciduous teeth are shed. However, retained deciduous teeth (where the baby tooth fails to fall out) occur in roughly 10–40% of dogs depending on breed, with toy breeds at highest risk. Retained teeth are considered abnormal and should be evaluated by a veterinarian, as they can cause misalignment, periodontal disease, and pain.
How do dogs process the discomfort of teething?
Dogs experience teething pain through the same trigeminal nerve pathways that humans use. The eruption of a tooth through bone and gingiva triggers a localized inflammatory response — prostaglandins and cytokines are released, causing swelling, warmth, and pain signaling. Dogs cope by seeking counter-pressure through chewing, which temporarily overwhelms the pain signals with competing mechanoreceptor input. This is why chew toys provide genuine relief, not just distraction.
Is bleeding gums during teething normal?
Yes, minor bleeding is expected. When a deciduous tooth separates and falls out, a small amount of bleeding from the gingival socket is normal and should stop within minutes. You may notice pink-tinged drool or small blood spots on chew toys. If bleeding is profuse, lasts more than 24 hours, or is accompanied by swelling and pus, contact your veterinarian — this may indicate infection or a fractured tooth rather than normal teething.
Why do puppies' breath smell bad during teething?
"Puppy breath" changes during teething due to increased gingival inflammation, minor bleeding, and the presence of loose tissue around shedding teeth. This creates an environment where oral bacteria proliferate more rapidly, producing volatile sulfur compounds that cause odor. The smell should resolve within 1–2 weeks after each tooth is shed. Persistent foul breath beyond the teething window warrants a veterinary dental exam.
Can I give my puppy ice cubes for teething pain?
Yes, plain ice cubes are safe and provide cold therapy to inflamed gums. However, they are a choking risk for small puppies (under 15 lb / 7 kg) — crush or shave the ice instead. Some owners freeze low-sodium chicken broth in ice cube trays for added appeal. Never give ice to dogs prone to dental fractures (Greyhounds, breeds with existing dental work).
Jonas Cole
All our authors care for dogs every day — read more of their work on the authors page.
