Adolescent Regression
Why your well-trained puppy suddenly 'forgets' everything at 6-18 months — and what to do about it.
Key Points
Adolescent regression is neurobiology, not defiance. Her brain is under construction.
Go back to basics: re-train, increase management, raise treat value, lower expectations.
Never escalate. Frustration and punishment make adolescent regression worse.
Stay consistent. Dogs who get trained through adolescence come out the other side solid.
What's Happening
Between 6 and 18 months, Bryn's brain is undergoing massive reorganization. Neural pathways are being pruned and rebuilt. Hormones are surging. Her world is getting bigger and more interesting. Behaviors that were reliable at 4 months may suddenly fall apart. This isn't defiance — it's neurobiology. She's not choosing to ignore you; her brain is literally under construction.
What It Looks Like
Recall that was perfect suddenly fails. Sit requires three repetitions. She 'forgets' that pulling on the leash isn't allowed. Impulse control disappears. She becomes more reactive to other dogs, people, or stimuli. She tests boundaries she hasn't pushed since puppyhood. Attention span drops. It can feel like starting over. The good news: you're not. The foundation is still there — it just needs reinforcement.
The Fear Period Connection
Many adolescent dogs go through a second fear period, typically between 8 and 14 months. Things that never bothered Bryn before — a trash can, a person in a hat, a specific sound — may suddenly frighten her. This is separate from the general adolescent regression but often overlaps. During a fear period, do not force exposure. Let her observe from a distance she's comfortable with, pair the scary thing with high-value treats, and give her time.
What to Do
Go back to basics. Literally. Re-train foundation behaviors as if she's learning them for the first time — she may need it. Increase management (more leash, more barriers, more supervision). Lower your expectations temporarily. Increase reward value (this is a Tier 3 treat phase). Keep sessions short and fun. Be patient — this phase has an end date, even if it doesn't feel like it.
What Not to Do
Don't assume she's being 'dominant' or 'defiant.' She's not. Don't escalate — if you respond to regression with frustration, force, or punishment, you'll damage the relationship you've built and make the regression worse. Don't stop training — consistency through adolescence is what separates dogs who come out the other side with solid skills from dogs whose owners gave up.
The Timeline
Adolescence in dogs lasts roughly from 6 to 18-24 months, with the peak difficulty usually between 8 and 14 months. For German Shepherds and mixes, it often runs longer than for smaller breeds. You will see improvement. It's gradual, non-linear, and punctuated by good days and bad days. By 2-3 years old, most dogs have settled into reliable adults — if the training stayed consistent through adolescence.