Most puppy biting consultations tend to land on my desk at exactly the same time.
Around 12 to 16 weeks.
And that timing is not a coincidence.
It’s teeth and development colliding.
By this stage, many owners feel like their once sweet, sleepy puppy has suddenly become bold, mouthy, and determined to bite everything — including hands, sleeves, ankles, and furniture.
It can feel personal.
It can feel intentional.
And it can feel like things are getting worse instead of better.
But what’s usually happening is far more predictable — and far less dramatic — than it seems.
The Teething Timeline (That Nobody Warns You About Properly)

Puppies don’t suddenly “start teething” at four months. It’s been happening in stages since birth.
Here’s a simplified timeline:
- Incisors begin erupting at around 2–3 weeks
- Canines follow at roughly 4 weeks
- Premolars and molars appear between 3–6 weeks
- The last baby molars are typically through by 6–8 weeks — often right when puppies go home
That means most puppies arrive in their new homes with a full set of baby teeth already in place.
Then comes the next phase.
Permanent teeth begin replacing baby teeth “tooth for tooth”, plus 14 additional adult molars.
By around 6–7 months of age, most dogs have their full adult set of 42 teeth.
The peak discomfort for many puppies?
Right around 12–16 weeks.
Exactly when owners start noticing “big personality changes”.
Where Owners Get Misled
Teething doesn’t happen in isolation.
It overlaps with a developmental stage where puppies become:
- More curious
- More confident
- More mobile
- More experimental
They are exploring the world with their mouths at the same time their gums feel uncomfortable and their brains are developing rapidly.
This is often when I hear words like:
- “Dominant”
- “Aggressive”
- “Testing boundaries”
- “Trying it on”
But what you are usually seeing is a combination of:
- Physical discomfort
- Normal exploratory behaviour
- Increasing independence
- Reduced sleep
- Overstimulation
It is development — not defiance.
Understanding that early changes how you respond, and that response matters.

Why Punishment Backfires During This Phase
When biting increases, many owners instinctively increase rules.
More “no”.
More corrections.
More pressure.
But the most effective approach during this stage is usually the opposite.
Push management and redirection first. Not punishment.
Because if a puppy has free access to the entire house 24/7, you are setting both of you up to fail.
What Management Actually Means
Management isn’t giving up on training.
It’s creating an environment where training can succeed.
That means:
- Reducing access rather than increasing rules
- Using a pen, crate, or safe confinement area so supervision is realistic
- Keeping the environment boring and safe
- Making legal chew items easy to find
- Making illegal items impossible to reach
If shoes, table legs, and sleeves are constantly available, chewing them is not misbehaviour — it’s opportunity.
A well-managed environment lowers rehearsal of unwanted behaviour and reduces frustration on both sides.

But Training Still Matters
Management alone isn’t enough.
Owners still need a clear, calm plan for what to do in the moment when biting happens.
That might include:
- Redirecting to an appropriate chew
- Pausing interaction briefly
- Checking for overtiredness
- Short, structured play sessions
- Ensuring enough rest throughout the day
Because many “bitey” puppies are actually overtired puppies.
And overtired puppies make poor decisions.
The Reframe That Changes Everything
When we understand that 12–16 weeks is:
Teething + development + growing independence
…we stop asking:
“Why is my puppy being like this?”
And start asking:
“How can I support this stage better?”
That shift reduces blame.
It reduces panic.
And it reduces the temptation to label normal development as something more concerning.
A Final Reassurance
If your puppy feels mouthier than ever right now, you are not alone.
This stage is common.
It is predictable.
And it is temporary.
With thoughtful management, appropriate outlets, and realistic expectations, most puppies move through this period without long-term issues.
It’s not dominance.
It’s not aggression.
And it’s not a character flaw.
It’s development.
And development needs guidance — not punishment.
And if you need further help with your puppy I have another puppy class in Plymouth on March 1st click here to book 👇🐕

If you need extra help I am available online for 1-2-1 help here 👇
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