Puppy Teething Stages: A Complete Timeline Guide for Dog Owners

Introduction

Puppy teething is a natural process that spans roughly seven months, transforming your new puppy from a toothless newborn into a fully-equipped adult dog with a complete set of permanent teeth. Understanding each teething stage helps pet parents anticipate behavioral changes, provide appropriate care, and avoid common pitfalls that can affect their puppy’s dental development long-term.

This guide covers all four distinct puppy teething stages, timing expectations for different breed sizes, stage-specific care strategies, and red flags that warrant veterinary attention. Whether you’re raising a tiny Chihuahua or a towering Great Dane, the information here applies to your situation-with breed-specific nuances clearly noted throughout.

Puppy teething occurs in four main stages: the newborn phase (0–3 weeks), baby teeth eruption (3–8 weeks), the transition period (12–24 weeks), and adult teeth completion (6–8 months). Puppies are born completely toothless, develop 28 baby teeth by around 8 weeks of age, and ultimately replace them with 42 adult teeth by approximately 6–8 months.

By reading this guide, you will gain:

• Clear recognition of which teething stage your puppy is currently in
• Realistic behavioral expectations for each phase, including puppy chewing and puppy biting patterns
• Appropriate care strategies and teething remedies tailored to each stage
• Knowledge of red flags like retained baby teeth, excessive bleeding, or bad breath that require intervention
• Confidence in preparing for each upcoming phase of your puppy’s dental development

Understanding Puppy Dental Development

Puppy teething describes the entire process of developing and replacing a puppy’s initial set of 28 baby teeth-also called deciduous teeth or milk teeth-with 42 permanent adult teeth. This process begins at birth and typically concludes by 6–8 months of age, making it one of the longest developmental transitions your puppy will experience.

Proper dental development is essential for far more than a healthy smile. Your puppy’s teeth determine how effectively they can eat, play, and interact with their environment. Disruptions during the teething process can lead to crooked teeth, missing teeth, or dental health problems that persist throughout adulthood.

Baby Teeth vs. Adult Teeth

A puppy’s 28 baby teeth are noticeably different from the 42 permanent teeth that replace them. Deciduous teeth are smaller, thinner, and significantly sharper-any pet parent who has felt those tiny teeth during play can attest to this. They include incisors, canines, and premolars, but notably lack molars entirely.

Puppies develop 42 adult teeth after losing 28 baby teeth. The adult dental formula consists of 12 incisors, 4 canine teeth, 16 premolars, and 10 molars. These permanent adult teeth are larger, stronger, and designed to handle the demands of adult nutrition, including harder kibble and appropriate chew toys.

The transition from baby to adult teeth relies on a biological process called root reabsorption. As permanent tooth buds form beneath the gum line, they exert pressure on the roots of the deciduous teeth above them. This pressure triggers the gradual dissolution of baby tooth roots, causing them to loosen and fall out naturally-often without the puppy or owner even noticing. Some puppies may swallow their baby teeth during teething, which is completely harmless.

Breed and Size Variations

Not all puppies follow the same teething timeline. A 2023 study from Ghent University examining 440 puppies across 82 breeds confirmed that breed size and skull type significantly influence both the onset and completion of permanent dentition.

Small and toy breeds-like Chihuahuas and Pomeranians-tend to experience delayed eruption of permanent teeth, sometimes not completing the process until 7–8 months of age. Large breeds like Great Danes and Labrador Retrievers may finish slightly earlier. Brachycephalic (short-nosed) breeds such as Pugs and Bulldogs face additional challenges, including dental crowding and higher rates of retained baby teeth. If you’re training a toy breed like a Chihuahua, understanding these timing differences is especially important.

Individual genetic factors within any breed can also shift timing by several weeks, so the ranges provided throughout this guide represent typical windows rather than rigid deadlines.

The Four Puppy Teething Stages

The puppy teething timeline follows a predictable four-stage progression. While the exact timing varies based on breed and individual genetics, the sequence remains consistent: toothless newborn, baby teeth eruption, active tooth replacement, and adult completion. The teething stage usually lasts from birth to about 7 months of age.

Stage 1: Newborn Phase (0–3 Weeks)

Newborn puppies arrive completely toothless. During these first weeks, their mouths are designed exclusively for nursing, with strong suckling reflexes but no capacity for chewing. Like human babies, puppies at this age depend entirely on their mother’s milk (or a high-quality puppy formula) for all nutritional needs.

Mouth exploration during the newborn phase is limited to suckling and basic rooting behaviors. There is no chewing behavior or teething discomfort to manage. The primary care focus remains on ensuring adequate milk supply, monitoring healthy weight gain, and supporting the mother-puppy bond.

Stage 2: Baby Teeth Eruption (3–8 Weeks)

Baby teeth begin appearing at approximately 3 weeks of age, marking the first visible milestone in your puppy’s dental development. The first to emerge are the tiny incisors at the front of the puppy’s mouth, followed by the sharp canine teeth around 4–5 weeks of age. Premolars complete the set, and puppies usually have a full set of 28 baby teeth by 8 weeks.

Around 5–6 weeks, the introduction of soft solid puppy food begins alongside continued nursing-a process made possible by those newly emerged puppy teeth. Most puppies experience only minimal discomfort during this teething phase, as the tiny teeth break through relatively soft gum tissue.

This stage typically coincides with your puppy’s time with the breeder, but understanding it helps pet parents recognize what happened before their new puppy arrived home.

Stage 3: Transition Period (12–24 Weeks)

The transition period is the most challenging puppy teething phase for both puppies and their owners. Puppies start teething at 12–16 weeks of age, when the first baby teeth begin loosening and adult teeth erupt beneath them. This is when most puppies experience significant gum soreness, increased chewing, and noticeable behavioral changes.

Puppies typically start losing baby teeth around 3 to 4 months of age, with the process continuing through about 5 months. The sequence follows a consistent pattern: adult incisors appear first (12–16 weeks), followed by permanent canines (16–20 weeks), and premolars (16–24 weeks). Sharp adult canine teeth and premolars emerge during the teething process, and the puppy’s mouth may temporarily contain both baby and adult teeth simultaneously.

During teething, puppies may display excessive chewing and drooling. Puppies may exhibit signs of irritability and reduced appetite when teething, and they may experience sore gums that drive them to target objects like shoes and furniture. Teething puppies may experience swollen or bleeding gums, and teething can cause puppies to have bad breath. Increased chewing is a common sign of teething-this is not misbehavior but a physiological response to genuine discomfort. Understanding this distinction is essential for anyone working on puppy obedience training during this period.

Stage 4: Adult Teeth Completion (6–8 Months)

The final teething stage brings the emergence of adult molars-teeth that puppies never had in their deciduous set. Puppies typically finish teething by 6–8 months of age, at which point the full adult dental formula of 42 permanent teeth is established. Puppies develop 42 adult teeth after losing baby teeth, completing the transition to their lifetime dentition.

Chewing behavior typically decreases as gum discomfort subsides, though many dogs retain a healthy interest in chewing throughout their lives. The adult teeth are considerably less sharp than those needle-like baby teeth, and the jaw has developed enough strength to handle appropriate adult chew toys and dental treats.

Small and brachycephalic breeds may take slightly longer to reach full completion-sometimes beyond 7 months-so continued monitoring is important for these breeds. Regular dental checks can prevent issues like tartar build-up as your puppy transitions into their adult dental care routine.

Stage-Specific Care and Management

Each puppy teething stage presents unique needs and challenges. Adapting your care approach to match your puppy’s current stage makes the teething process smoother for everyone involved and sets the foundation for lifelong dental health.

Newborn Care (0–3 Weeks)

The newborn phase requires minimal dental-specific intervention. Your focus should be on:

• Ensuring proper nutrition through nursing or bottle feeding with high-quality puppy formula
• Beginning gentle handling of the puppy’s mouth and face to establish comfort with future dental care
• Monitoring weight gain and developmental milestones
• Maintaining a clean, warm environment that supports overall health

Even at this early stage, gentle mouth handling helps prepare puppies for the dental care they will need later. Early handling builds the kind of confidence that carries forward into all aspects of training.

Baby Teeth Management (3–8 Weeks)

As baby teeth begin emerging, care shifts toward supporting healthy eruption and establishing positive associations with mouth handling:

• Introduce age-appropriate soft foods around 5–6 weeks to complement nursing, avoiding overly hard kibble that could damage delicate developing teeth
• Continue gentle, consistent mouth handling-touching gums, lips, and teeth briefly during calm moments
• Provide safe, soft chew items like small rubber puppy toys to satisfy emerging exploration instincts
• Begin basic bite inhibition during play, teaching puppies that gentle mouths earn continued interaction

This is also an ideal time for breeders to begin socialization practices that make future veterinary dental exams and teeth-brushing routines far less stressful.

Transition Period Support (12–24 Weeks)

This teething stage demands the most active management. Your teething puppy needs appropriate outlets for chewing, pain relief, and continued training consistency.

Chew Option	Appropriate	Why
Frozen rubber toys	✅ Yes	Soft rubber toys are ideal for teething puppies; cold soothes inflamed gums
Frozen baby carrots	✅ Yes	Frozen baby carrots can soothe a teething puppy’s gums safely
Chilled wet washcloths	✅ Yes	Gentle texture provides relief for sore gums
Puzzle-stuffed Kongs	✅ Yes	Mental stimulation combined with appropriate chewing
Rope toys	✅ With supervision	Good texture variety; monitor for fraying and ingestion
Hard bones or antlers	❌ No	Risk of fracturing developing teeth
Rawhide	❌ No	Choking hazard and can cause digestive issues
Cooked bones	❌ No	Splinter risk and excessive hardness for emerging teeth

Beyond providing the best teething toys and cold treats, increase mental and physical stimulation through short training sessions, puzzle feeders, and supervised socialization. The goal is to redirect unwanted chewing behaviors toward appropriate outlets rather than punishing what is a natural response to discomfort.

Begin brushing routines during this stage by introducing a puppy-safe toothbrush and pet-safe toothpaste through positive reinforcement. Short, rewarding sessions build cooperation that pays dividends for years.

Adult Teeth Establishment (6–8 Months)

Once puppies stop teething, care shifts toward establishing lifelong dental health habits:

1. Begin brushing your puppy’s teeth regularly with a canine-specific toothbrush and pet-safe toothpaste, starting with brief sessions and gradually increasing duration
2. Transition to adult-appropriate chew toys and dental treats that help clean teeth without causing damage
3. Schedule a professional veterinary dental evaluation to confirm all 42 permanent teeth have erupted properly and no retained baby teeth remain
4. Establish a routine of regular at-home dental inspections, checking for swollen gums, bad breath, or signs of developing problems

This is also an excellent time to evaluate your puppy’s overall behavioral training progress, as the resolution of teething discomfort often reveals a calmer, more focused learner.

Common Challenges and Solutions by Stage

Each puppy teething phase presents unique challenges that can worry even experienced pet parents. Knowing what is normal-and what requires intervention-prevents unnecessary stress and ensures timely action when it matters.

Transition Period Destructive Chewing

Puppy chewing during the transition period is driven by genuine physical discomfort, not defiance. Puppies may experience sore gums and may target objects like shoes and furniture while teething. To help a teething puppy through this phase:

• Provide multiple texture options including frozen rubber toys, chilled wet cloths, and safe chew toys to soothe sore gums
• Increase daily exercise and mental stimulation through training sessions and interactive play to reduce boredom-driven destruction
• Rotate teething toys frequently to maintain novelty and interest
• Puppy-proof your home by removing valuable or dangerous items from reach during peak chewing months

How long does puppy teething last during this destructive phase? Most puppies experience the worst of it between 4–6 months of age, with a noticeable decrease once the adult teeth are firmly established.

Retained Baby Teeth (6+ Months)

Retained baby teeth occur when a puppy’s baby teeth fail to fall out naturally as permanent teeth erupt. Retained baby teeth can cause overcrowding and misalignment, leading to enamel damage, gum injury, and increased risk of periodontal disease.

This condition is significantly more common in toy breeds and brachycephalic breeds. If any baby teeth remain alongside their adult replacements by 7 months of age, schedule a veterinary evaluation. Treatment typically involves surgical extraction-a straightforward procedure often performed during spay or neuter surgery.

Excessive Bleeding or Pain

Mild bleeding gums when a tooth is naturally shed is normal. However, distinguishing routine puppy teething symptoms from concerning signs requires attention:

• Normal: Small amount of blood on chew toys, brief pink-tinged drool, slight gum tenderness
• Concerning: Heavy or persistent excessive bleeding, pus or discharge around the gum line, extreme reluctance to eat lasting more than a day, visible swelling beyond minor inflamed gums

If your puppy shows signs of infection, severe puppy teething pain unresponsive to cold treats and appropriate teething remedies, or refuses food for more than 24–48 hours, seek veterinary evaluation promptly.

Behavioral Regression During Teething

Teething puppies often exhibit behavioral changes that can feel like regression-increased puppy biting, decreased tolerance for handling, irritability during training sessions, and shorter attention spans. This is a normal response to chronic low-level discomfort, similar to how human babies become fussy during teething.

The key is maintaining consistent training expectations while acknowledging your puppy’s physical reality. Continue bite inhibition work using redirection rather than punishment. Keep training sessions shorter and ensure your puppy has access to appropriate chew toys before and during sessions. If regression is significant, working with a professional dog behavior trainer can help you maintain momentum without creating negative associations during this sensitive developmental window.

Conclusion and Next Steps

Understanding the four distinct puppy teething stages-newborn, baby teeth eruption, transition, and adult completion-transforms this natural process from a source of frustration into a manageable, predictable part of raising a healthy dog. The teething process affects your puppy’s behavior, eating habits, and training responsiveness, making stage-awareness essential for every pet parent.

Take these immediate steps to support your teething puppy:

1. Assess your puppy’s current stage by checking their age and examining the puppy’s mouth for emerging or loosening teeth
2. Provide stage-appropriate toys including soft rubber toys, frozen treats, and safe chew toys matched to their current needs
3. Schedule a veterinary dental checkup around 6 months of age to confirm proper development and rule out retained baby teeth
4. Begin brushing your puppy’s teeth with pet-safe toothpaste if you haven’t already, building toward a lifelong dental care routine

Proper teething management directly supports long-term training success and behavioral development. A puppy whose discomfort is managed, whose chewing needs are met, and whose dental health is monitored becomes a more confident, cooperative adult dog. If your puppy’s teething challenges are affecting training progress, consider exploring professional puppy training options to keep development on track during this critical period.

Additional Resources

Puppy Teething Timeline Quick Reference:

Age	What to Expect
0–3 weeks	Toothless; nursing only
3–8 weeks	28 baby teeth emerge; soft food introduction begins
12–16 weeks	Puppies start losing baby teeth; adult incisors appear
16–24 weeks	Adult canines and premolars erupt; peak chewing and discomfort
6–8 months	All 42 adult teeth in place; most puppies stop teething

Approved Chew Toy Recommendations by Age:

• 3–12 weeks: Soft rubber puppy toys, small plush toys with no detachable parts
• 12–24 weeks: Frozen Kongs, chilled rope toys, rubber teething toys, frozen baby carrots
• 6+ months: Durable rubber toys, dental chews, size-appropriate nylon toys

Signs Requiring Immediate Veterinary Attention:

• Baby teeth still present alongside adult teeth after 7 months
• Heavy or persistent bleeding from the puppy’s gums
• Pus, extreme swelling, or foul odor from the mouth
• Refusal to eat or drink for more than 48 hours
• Visible crooked teeth or misalignment affecting bite
• Any sign of facial swelling or abscess formation