Why your well behaved puppy suddenly changed (& what is actually going on!)

You brought home your puppy, did everything right, and for the first few months things seemed to be going well.

• They learned to sit.

• They came back when called.

• Walks were manageable.

• Visitors could come over without chaos.

Then suddenly… everything changed.

Your once “good puppy” is now ignoring you, pulling like a train on the lead, jumping up at everyone, and pretending recall doesn’t exist.

Sound familiar?

Welcome to adolescence.

The Teenage Phase Nobody Warns You About

Just like humans, dogs go through a teenage stage. This typically starts somewhere between 6–10 months and can last well into 18–24 months, depending on the breed.

During this stage dogs experience huge developmental changes. Their confidence grows, their curiosity increases, and their brains are still learning how to control impulses.

Which means behaviours that seemed “fixed” during puppyhood suddenly disappear.

It’s not that your dog has forgotten everything.

It’s that they’re learning to navigate the world with independence, distractions suddenly feel far more exciting, and your training now needs to evolve with them.

Why Training Needs to Change During Adolescence

Many owners assume they’ve done something wrong when their dog hits this stage.

In reality, adolescence is where the real training begins.

This is the stage where we build skills like:

• Reliable recall around distractions

• Calm behaviour around people and dogs

• Walking nicely on the lead in real environments

• Settling in cafes, pubs and busy spaces

• Making good decisions without constant management

Training during this phase isn’t about quick fixes. It’s about guiding your dog through a critical developmental period so they grow into a calm, well-mannered adult.

The Good News

Adolescence can feel frustrating, exhausting and confusing, but it’s also an incredibly important opportunity.

With the right guidance, consistency and structure, this stage is where dogs truly learn how to behave in the real world.

And the owners who invest in training during this phase often end up with the dogs everyone else admires.

You know the ones.

The dog that walks calmly through town.

The dog that comes back when called.

The dog that can relax in the pub at your feet.

Those dogs aren’t “just naturally good”.

They’re trained.

If your young dog has suddenly become harder to manage, you’re not alone — and you’re not doing anything wrong.

You’re simply navigating the teenage phase.

And with the right support, it’s a phase you can absolutely come out the other side of.