Puppy Teething and Bite Habit Prevention Guide | Transition from Deciduous to Permanent Teeth and Biting Behavior Management

When Does Puppy Teething Occur?

Puppies begin to develop deciduous teeth at 3–4 weeks of age, and all deciduous teeth (28 in total) are usually in place by 2–3 months of age. Subsequently, between 3–7 months of age, the deciduous teeth fall out and are replaced by permanent teeth (42 in total). The sequence of teething follows a general pattern, beginning with the incisors (front teeth), followed by the canines, and finally the molars.

During this period, puppies experience gum discomfort and itching, causing a marked increase in chewing behavior. This is an instinctive and physiological process, not a sign that the puppy is "bad." Experienced breeders and trainers consistently emphasize that teaching puppies what is and isn't acceptable to chew during this period influences their ability to control biting behavior throughout their lives.

Note that the timing of teething varies slightly by breed. In small breeds such as Chihuahuas and Pomeranians, the process may continue until 5–8 months of age, so patience and gentle observation are important.

Health Signs During Teething and Retained Deciduous Teeth

Understanding Normal Signs

During teething, you may observe changes such as small deciduous teeth falling on the floor or bedding, but swallowing them is typically harmless. The gums may become reddened and swollen, drooling may increase, and appetite may decrease slightly. These are normal signs, but if decreased appetite persists for several days or the puppy seems unusually lethargic, consult a veterinarian.

Watch for Retained Deciduous Teeth

Retained deciduous teeth occur when permanent teeth erupt but deciduous teeth do not shed. This is most common with canines and frequently occurs in small breeds. When deciduous and permanent teeth grow side by side, plaque accumulates more easily between teeth, increasing the risk of misaligned bite, bad breath, and periodontal disease. If deciduous teeth have not shed by 6–7 months of age, consult a veterinarian promptly. In some cases, extraction under general anesthesia may be necessary.

Items to Ease Gum Discomfort

Providing items to ease teething discomfort helps reduce unwanted chewing.

• Damp towels or bandanas that are partially frozen (the cool sensation soothes the gums)
• Kong toys stuffed with food and frozen
• Natural rubber gum massage toys
• Freezer-safe chew toys for dogs

Complete freezing risks tooth damage, so partial freezing is safer.

Basics of Training to Prevent Biting Habits

Bite Inhibition (Learning to Control Bite Force)

Dogs naturally learn to moderate their bite force through play with littermates, experiencing that biting too hard causes playmates to disengage. It is important to recreate this learning in interactions with humans.

When a puppy bites your hand, cry out "Ouch!" in a high-pitched voice, immediately stop play, and ignore the puppy for a few seconds. Then resume play by offering a toy and saying "Chew this instead." Consistently repeating this sequence teaches the puppy the cause-and-effect relationship that "biting hands means playtime ends." Withdrawing your hand too quickly may be misinterpreted as a chasing game, so it is important to remain calm and slowly move your hand away.

Preventing Biting on Furniture and Cords

Assume that anything within a puppy's sight line is at risk of being chewed.

• Apply bitter apple (bitter-tasting spray) to furniture legs and wallpaper corners
• Protect electrical cords with cord covers or protective sleeves
• Replace trash cans with lidded versions or move them out of reach
• Keep leather goods and shoes stored away

When the puppy is alone, restricting activity with a playpen or crate is also effective. Physically preventing destructive behavior reduces negative learning experiences and promotes correct learning.

Choosing and Offering Toys

Toys are an important tool for clearly communicating what is acceptable to chew. Rope toys, Kongs, natural rubber chew toys, and nylon chews are suitable options. Avoid old socks or shoes (which puppies cannot distinguish from current items) and inexpensive plush toys that fall apart easily (posing choking hazards). By dedicating time to play with toys several times daily, you can satisfy both exercise and chewing needs simultaneously.

Building a Foundation for Dental Care Habits

The teething period is an ideal time to establish comfort with tooth brushing. Once a dog reaches adulthood, introducing a toothbrush often meets strong resistance. Early puppyhood is the best opportunity to establish this habit.

Gradual Desensitization Steps

1. Touching around the mouth (1–2 weeks): Gently touch around the mouth and lips while petting; praise and reward if the puppy doesn't resist
2. Touching inside the mouth (1–2 weeks): Gently touch the teeth and gums with your finger to acclimate the puppy to having a finger inside its mouth
3. Introducing toothpaste: Apply dog-safe toothpaste (chicken or vanilla flavored) to your finger and allow the puppy to lick it
4. Using a finger brush: Once acclimated, gently rub with a finger brush
5. Transitioning to a toothbrush: Ultimately aim for brushing with a dog toothbrush once daily or 3–4 times per week

It is crucial to stop each step before the puppy shows resistance. If tooth brushing becomes associated with something unpleasant, correcting this later becomes very difficult. Because deciduous teeth have thin enamel, brush gently rather than with force. Simply wiping with dental wipes or gauze is also sufficiently effective.

What Breeders Say: Things Only Possible During This Time

The teething period from 3–7 months of age coincides with puppies' peak sensitivity to socialization and learning. Experiences during this time leave lasting impressions on behavioral patterns, making consistent and appropriate interactions crucial.

First, prepare for future veterinary exams and grooming salon visits by acclimating the puppy to having its mouth, teeth, and gums handled by humans. This not only helps with tooth brushing but also proves invaluable when checking for foreign objects ingested or administering medication.

Next, it is essential that all family members consistently apply the same rules. If one parent tolerates biting while another scolds, the puppy becomes confused and struggles to learn the rules. Establish rules as a family beforehand and maintain consistent responses.

Finally, never allow the puppy to play with human hands or feet as toys. While cute as a puppy, a serious bite from a large dog later can cause serious injury. From a young age, establish and enforce the rule that play always involves toys, never hands or feet.

Puppies that successfully navigate the teething period develop bite control and dental care habits, leading to calmer lives ahead. Patience and consistent engagement throughout this period provide the best long-term foundation.