Puppy Biting by Age: Teething, Play, Landshark & Development

A complete timeline explaining puppy biting by age, including teething stages, the landshark phase, and when puppies typically grow out of biting behavior.

3/6/20266 min read

If you’re raising a puppy, you may notice that biting behavior seems to change as your puppy grows.

One week your puppy gently mouths your fingers.

A few weeks later they seem determined to attack socks, sleeves, and shoelaces.

Then suddenly they become calmer again.

Many dog owners wonder:

“Why does my puppy’s biting change so much with age?”

The answer lies in development.

Puppies go through several stages of physical and neurological growth that influence how they interact with the world — and their mouths play a major role in that process.

Understanding these age-based changes can help you recognize what is normal and what your puppy is learning at each stage.

(If you're looking for a full overview of puppy biting behavior, start with:

Why Puppies Bite: The Complete Dog Owner’s Guide.)

Why Age Matters in Puppy Biting

Puppy biting follows predictable developmental patterns.

Their biting behavior evolves alongside several developmental changes:

• brain development

• teething stages

• coordination growth

• emotional regulation

• social learning

As these systems mature, the purpose and intensity of biting shifts.

What looks like the same behavior on the surface may actually have very different causes depending on the puppy’s age.

8–10 Weeks: The Discovery Stage

When puppies first enter their new homes, they are experiencing a massive environmental shift.

Everything around them is unfamiliar.

During this stage, puppies primarily use their mouths to explore new objects and textures.

Common behaviors include:

• gentle nibbling of fingers

• mouthing clothing

• chewing random household items

• investigating shoes or furniture

This behavior is driven by curiosity rather than excitement.

At this stage, biting pressure is usually light because puppies are still learning how their teeth interact with objects.

10–12 Weeks: The Social Play Stage

As puppies settle into their new home, their confidence begins to grow.

This stage often introduces play-based biting.

Puppies begin engaging more actively with their owners and may start:

• grabbing hands during play

• chasing toys

• nipping during excitement

• tugging on sleeves

This stage reflects the puppy’s growing desire for interactive play.

Your household becomes the new environment where these social behaviors are expressed.

12–14 Weeks: The Landshark Phase

As puppies grow through early development, many enter what owners commonly call the landshark phase.

This stage often feels dramatic.

Biting becomes:

• faster

• more frequent

• more energetic

Puppies may begin chasing:

• ankles

• moving clothing

• hands during play

This change occurs because puppies experience several developmental shifts at once.

Their coordination improves, their confidence increases, and their curiosity expands.

They are also beginning to experiment with how their behavior influences their environment.

This experimentation can make the puppy appear more mischievous or bold.

14–16 Weeks: The Teething Transition

Between three and four months, puppies begin the transition from baby teeth to adult teeth.

This stage introduces physical discomfort in the gums as adult teeth begin forming under the surface.

While chewing increases during this period, the more interesting change is neurological.

Teething also coincides with rapid development in the puppy’s sensory processing system.

As a result, they may investigate objects more frequently using their mouths.

4 Months: The Sensory Expansion Stage

Around four months, puppies experience a surge in environmental awareness.

They begin noticing more subtle details in their surroundings, including:

• small movements

• sounds

• textures

• changes in routine

This heightened awareness often increases curiosity-driven mouthing.

However, many puppies also begin developing better bite pressure control during this stage.

You may notice that while your puppy still mouths frequently, the pressure becomes softer.

This improvement reflects the puppy’s developing motor coordination.

5 Months: Emotional Regulation Begins

Around five months, puppies begin developing stronger emotional control.

The brain areas responsible for impulse regulation start maturing.

During this stage you may see:

• shorter biting episodes

• calmer recovery after excitement

• improved ability to disengage from play

Although biting may still occur, puppies are beginning to understand how to regulate their energy.

This developmental shift is subtle but important.

6 Months: The Social Maturity Shift

At around six months, puppies experience another behavioral transition.

Their adult teeth are nearly fully developed, and their nervous system has matured significantly.

This stage often brings noticeable improvements such as:

• softer play interactions

• reduced nipping

• improved focus during interaction

• longer calm periods

Many puppies begin showing calmer interaction patterns during this stage.

6–7 Months: The End of the Landshark Phase

For most puppies, the most intense biting stage ends between six and seven months of age.

By this stage most puppies have moved past the most intense biting phase.

While occasional mouthing may still appear during play, the relentless biting behavior usually fades.

The puppy is transitioning into early adolescence, where communication becomes more refined.

Why Development Varies Between Puppies

Although this timeline reflects common patterns, every puppy develops at a slightly different pace.

Several factors influence development speed, including:

• breed tendencies

• personality

• activity level

• environmental stimulation

• sleep quality

Because of these differences, two puppies of the same age may appear to behave very differently.

Understanding developmental variation helps prevent unnecessary worry.

What Owners Often Misinterpret

Many owners interpret biting behavior as intentional misbehavior.

However, most puppy biting is simply development in progress.

Puppies are learning:

• how their teeth interact with objects

• how humans respond to behavior

• how to regulate excitement

• how to communicate during play

When viewed through a developmental lens, biting becomes easier to understand.

Continue Learning About Puppy Biting

If you want to understand puppy biting more deeply, these guides can help:

• Why Puppies Bite: The Complete Dog Owner’s Guide

• Puppy Biting Stopping Timeline (Week by Week)

• Why Some Puppies Bite More Than Others

• Puppy Biting vs. Aggression: How to Tell the Difference

Together, these articles explain how puppy biting develops and what to expect as your dog grows.

Feeling Stuck in the Landshark Phase?

If your puppy currently feels like a tiny shark with teeth, you're not alone.

This stage is one of the most common challenges new dog owners face.

That's why we developed the Dog Milestones™ Puppy Biting Guide series. This guide was designed to help you confidently navigate your puppy's biting phase.