Puppies and adolescent dogs experience significant physical, neurological and emotional development during their early life stages. Many behaviours that concern owners during these periods are normal parts of development, although they may require guidance, management and appropriate teaching.

Puppyhood and adolescence are not simply smaller versions of adult behaviour. Young dogs are still developing:

• impulse control,
• emotional regulation,
• communication skills,
• confidence,
• problem-solving abilities,
• social understanding.

Many challenges occur because humans expect puppies and adolescent dogs to behave like mature adults before they have developed the skills required to do so.

Common concerns include:

• biting and mouthing,
• chewing,
• jumping,
• toileting accidents,
• overexcitement,
• barking,
• poor focus,
• frustration,
• difficulty settling,
• selective listening.

These behaviours should be understood within the context of development rather than interpreted as intentional disobedience.

A key principle is:

Young dogs are not difficult because they are immature; they are immature because they are still learning.

Understanding Puppy Development

Puppies as Developing Individuals

Puppies undergo rapid development from birth through adolescence.

During this time, they learn:

• how to interact socially,
• how to regulate emotions,
• how to respond to their environment,
• how to communicate,
• how to cope with challenges.

Development is influenced by:

• genetics,
• maternal care,
• litter experiences,
• human interactions,
• environmental exposure,
• health.

The Importance of Early Social Learning

Puppies learn important communication skills through interactions with:

• their mother,
• littermates,
• other appropriate dogs,
• humans.

These experiences contribute to learning:

• appropriate play,
• bite inhibition,
• social boundaries,
• emotional regulation.

Puppies removed from important social learning opportunities may require additional support developing these skills.

Puppy Exploration and Investigation

Puppies explore their environment through:

• smell,
• taste,
• touch,
• movement.

This means puppies commonly:

• chew objects,
• pick up items,
• investigate new things,
• explore household environments.

These behaviours are not signs of being “naughty”.

They are normal developmental behaviours that require appropriate guidance.

Puppy Biting and Mouthing

Why Puppies Bite

Puppy mouthing is a normal behaviour.

Puppies use their mouths to:

• explore,
• play,
• communicate,
• interact socially.

They are also developing control over:

• bite pressure,
• movement,
• excitement levels.

Bite Inhibition Development

Bite inhibition refers to a dog’s ability to control the force of its mouth.

Puppies develop bite inhibition through:

• interactions with littermates,
• feedback from their mother,
• appropriate human interactions.

When puppies bite too hard during play, social feedback teaches them that behaviour affects interactions.

Supporting Puppy Mouthing

Effective support involves teaching:

• appropriate objects for chewing,
• appropriate play behaviours,
• calm interaction.

Strategies may include:

• redirecting to suitable toys,
• reinforcing gentle behaviour,
• providing adequate rest,
• avoiding encouraging rough play.

Puppy Sleep and Behaviour

One commonly overlooked factor in puppy behaviour is sleep.

Puppies require substantial rest because growth and learning require recovery.

A tired puppy may display:

• increased biting,
• zooming,
• inability to settle,
• irritability,
• reduced impulse control.

A puppy that appears “overactive” may actually require more rest.

Adolescence in Dogs

Understanding the Adolescent Period

Adolescence is a major developmental stage where dogs transition from puppyhood toward adulthood.

During adolescence, dogs may experience changes in:

• confidence,
• independence,
• emotional responses,
• social behaviour,
• motivation.

This stage commonly occurs between approximately six months and two years, depending on breed and individual development.

Large breeds may mature more slowly than smaller breeds.

Common Adolescent Behaviours

Adolescent dogs may demonstrate:

• increased exploration,
• reduced attention,
• testing boundaries,
• increased excitement,
• changes in social behaviour,
• stronger environmental interests.

These behaviours are often misunderstood as the dog “forgetting training”.

However, adolescence involves significant neurological and hormonal changes.

The Adolescent Brain

Young dogs are still developing areas of the brain involved in:

• impulse control,
• decision-making,
• emotional regulation.

An adolescent dog may understand a behaviour but struggle to perform it in a highly stimulating environment.

For example:

A dog may reliably respond to a cue at home but struggle at a busy park.

This does not necessarily mean the dog is refusing.

The environment may exceed the dog’s current ability.

The Importance of Continued Learning

Training should not stop after puppyhood.

Adolescent dogs require continued:

• social learning,
• environmental exposure,
• reinforcement,
• skill development.

Expectations should increase gradually as the dog develops.

Regression During Adolescence

Many owners report that adolescent dogs appear to “go backwards”.

Examples include:

• reduced recall,
• increased pulling,
• increased excitement,
• renewed chewing,
• increased barking.

This is a normal developmental challenge.

Support involves:

• returning to foundations,
• reducing difficulty,
• reinforcing success,
• adjusting expectations.

The Role of Frustration

Young dogs often experience frustration because they:

• want access to things,
• have limited impulse control,
• lack experience.

Frustration may appear as:

• barking,
• jumping,
• whining,
• pulling,
• mouthing.

Teaching frustration tolerance is an important developmental skill.

Teaching Emotional Regulation

Emotional regulation is not automatic.

Dogs develop this through:

• appropriate experiences,
• predictable environments,
• reinforcement,
• rest,
• guidance.

Humans can support regulation by teaching:

• calm behaviour,
• waiting,
• disengagement,
• coping skills.

Socialisation Versus Exposure

A common misconception is that socialisation means introducing puppies to as many things as possible.

Effective socialisation is not simply exposure.

Quality matters more than quantity.

Positive socialisation involves:

• safe experiences,
• appropriate intensity,
• choice,
• confidence building.

A puppy overwhelmed by experiences may become fearful rather than confident.

The Role of Fear Periods

Some puppies and adolescent dogs experience developmental periods where they appear more sensitive to unfamiliar experiences.

During these periods, dogs may become more cautious about:

• people,
• objects,
• environments,
• sounds.

Support involves:

• avoiding overwhelming experiences,
• providing confidence-building opportunities,
• allowing the dog time to process.

Supporting Young Dogs Successfully

Young dogs benefit from:

Clear Communication

Dogs need to understand:

• what behaviour is expected,
• what choices are successful.

Appropriate Management

Management prevents repeated practice of unwanted behaviours.

Examples include:

• supervision,
• suitable environments,
• preventing access to unsafe items.

Reinforcement of Desired Behaviour

Dogs learn through consequences.

Rewarding appropriate behaviour increases the likelihood it will occur again.

Realistic Expectations

A puppy is not expected to behave like an adult dog.

Developmental stage should always be considered.

Common Human Mistakes

Expecting Adult Behaviour From Puppies

Young dogs require teaching and support.

Assuming Adolescents Are Being Defiant

Adolescents often require repetition and reinforcement.

Providing Too Much Stimulation

More activity does not always solve behavioural concerns.

Some dogs need:

• rest,
• calm activities,
• recovery time.

Ignoring Individual Differences

Every puppy develops differently.

Factors include:

• breed,
• genetics,
• personality,
• environment,
• experiences.

Key Practice Principle

Puppy and adolescent behaviour should be understood through the lens of development.

Young dogs are learning how to navigate the world.

Behaviour challenges are opportunities to teach:

• communication,
• emotional regulation,
• appropriate choices,
• confidence.

The goal is not to suppress normal developmental behaviours.

The goal is to support young dogs as they develop into confident, resilient adult companions.