What’s Actually Happening

Adolescence in dogs is driven by two overlapping biological processes: the surge of sex hormones that accompanies sexual maturity (beginning around six months in most breeds, later in large and giant breeds), and the still-in-progress development of the prefrontal cortex — the part of the brain responsible for impulse control, focus, and the ability to choose a trained response over an instinctive one.

The prefrontal cortex is not fully mature in dogs until somewhere between eighteen months and three years, depending on breed and size. During this window, your dog is genuinely, neurologically less capable of the sustained focus and reliable impulse control they showed at four months. This is not stubbornness. It is not defiance. It is a brain that is still being built.

The dog who blew past their recall to chase a squirrel is not choosing to ignore you. Their brain literally does not yet have consistent wiring to override that impulse. Knowing this makes it so much easier to respond with patience instead of frustration — and patience is exactly what moves this phase forward.

What It Looks Like

Adolescence is highly variable — some dogs coast through it, others throw themselves into it with full commitment. The most common things pet parents notice:

• Selective hearing (yes, like actual teenagers) — cues that worked reliably now seem to land only when convenient; the dog hears you, considers the information, and carries on with what they were doing

• The world gets very interesting — smells, other dogs, movement, and environmental stimulation all become compelling in a way they weren’t before; you may temporarily feel like the least interesting thing on the walk

• Leash manners may wobble — as the world gets more interesting and impulse control decreases, pulling and distraction often increase

• Revisiting old rules — behaviors that seemed settled may resurface for another look; the couch rule, the jumping, the counter-surfing may reappear as if being re-audited

• Big energy — adolescent dogs often need significantly more physical and mental exercise than they did as young puppies; a tired adolescent dog is a much more cooperative adolescent dog

• Some social shifting — easy dog friendships may become more nuanced as your dog approaches social maturity; this is normal and manageable
  

The Science That Makes It Make Sense

Research on canine adolescence has grown significantly in recent years. A landmark study published in Biology Letters found that dogs showed measurably reduced obedience to their primary attachment figure during adolescence — a pattern remarkably similar to the social independence of human teenagers. The finding that stood out most: the effect was strongest in dogs with insecure attachment relationships and least pronounced in dogs with secure, trusting ones.

This is genuinely encouraging news. It means the quality of the relationship you’ve built with your dog acts as a neurological buffer during this phase. A dog who trusts you, whose training has been built on positive reinforcement and a consistent relationship, has an easier adolescence than one who doesn’t. The work you put in early is protecting you both right now, even when it doesn’t feel like it.

What Helps

• Adjust expectations, not effort

  Adolescence is not the time to stop training — it’s the time to make training feel like play. Keep sessions short, successful, and fun. End before focus runs out. Practice in lower-distraction environments rather than expecting competition-level performance in the middle of a busy park. The goal right now is maintaining your dog’s love of working with you and the habit of doing it — not hitting new performance peaks.

• Lean on management

  If your adolescent dog is making poor choices, more management is a smarter response than more correction. Baby gates, leashes, crates, and tethers prevent the rehearsal of behaviors that, repeated enough, become habits. Using these tools generously is not giving up — it’s working smart.

• Meet the energy

  A well-exercised adolescent dog is a dramatically different dog than an under-stimulated one. Daily physical exercise, sniff walks, food puzzles, and training sessions that challenge the brain are not optional extras during this phase — they are what makes everything else manageable. If adolescence feels overwhelming, the first question worth asking is whether your dog is getting enough outlet for their energy.

• Guard the relationship

  Whatever your adolescent dog is currently doing — whatever they’re ignoring, destroying, or doing enthusiastically on the wrong furniture — do not let it damage the relationship. The dog who blew their recall and chased the squirrel doesn’t need a consequence when they come back; they need a warm welcome, because coming back to you needs to always feel like the right choice.

The relationship you build during adolescence is the relationship you’ll have for the rest of your dog’s life. It is more valuable than any individual incident, and it is worth more than being right.

A Note on Why This Phase Matters

We want to be honest: adolescence is the life stage when some pet parents, caught off guard by the shift, start to wonder if they made a mistake. We share this not to plant a worry, but to offer the reassurance that if you’re having that thought — you haven’t. You’re in a phase, not a permanent situation. And the Good Boy Foundation is here to help you through it.

If you’re struggling, please reach out to a positive reinforcement trainer before concluding that things can’t improve. Almost every dog in an adolescent rough patch can be helped. What they need, more than anything, is a pet parent who understands what’s happening and chooses to stay curious about it instead of feeling defeated by it.