Puppies and lessons
When does puppy adolescence start?
The phone call comes at seven months and the sentence is always the same: the puppy was perfect and now it ignores everything. Our trainers have good news and bad news. The puppy is normal, and the next year decides what kind of adult it becomes.
Last reviewed September 11, 2026 · by the Best Dog University Team
The short version
Six months to eighteen, and the trained puppy disappears for a while.
Adolescence arrives with the adult teeth and the hormones, around six months, and the puppy that sat, came and walked nicely becomes a dog that knows every cue and performs none of them, pulls toward every dog, stares at strangers, tests the couch and forgets the recall the moment anything moves. Small breeds start earlier and finish earlier, around a year; large breeds run to eighteen months; the giants and the guardian breeds test until two or three. Nothing was lost. The training is still in there, and the dog is doing what adolescents do, which is find out whether the rules are real. The families that hold them calmly get the adult they trained; the families that fight, or give up, get the adolescent for life.
- Six months, with the adult teeth and the hormones
- Small breeds finish around a year, large at eighteen months, giants later
- The cues are known and ignored
- Other dogs, strangers and the recall are the first casualties
- The rules are being tested, not forgotten
The reasoning
What is happening in the dog, and why more freedom is the wrong answer.
An adolescent dog has an adult body, a flood of hormones, a brain that is still rewiring and a sudden, strong interest in the world beyond its family, so the things that used to be the most rewarding, your voice and your food, lose to other dogs, scents and strangers. A dog in that state is not defiant; it is distracted by a world that got louder. The instinct is to give it more freedom because it is bigger, and that is exactly backward: freedom is when the rehearsal of bad habits happens, and the adolescent that is allowed off leash, into the dog park and onto the couch learns in six months what takes two years to undo. The leash goes back on, the long line replaces freedom, the distances shrink to where the dog can still hear you, and the rules stay exactly where they were.
Fear periods happen too. Many adolescents go through a few weeks of sudden wariness, of a trash can, a man in a hat, a storm, and those weeks are handled with distance and calm, never by forcing the dog to face it.
- An adult body, hormones, a rewiring brain, a louder world
- Distracted, not defiant
- More freedom means more rehearsal
- The leash back on, distances shorter, rules the same
- Fear periods met with distance and calm
What it means for your dog
The six-month turn, the year mark, the slow breeds, and the adolescent that has gone reactive.
At six to eight months the rules get tested and the answer is structure: the structured walk from a standstill, place with duration at every meal and arrival, the recall back on a long line, and no dog park, no off-leash time and no greetings on leash. At a year most medium and large dogs are coming out the other side and freedom is earned back a piece at a time. The slow breeds, the Rottweilers, the Danes, the mastiffs, the shepherds, are still testing, and the family holds the line longer. An adolescent that has become reactive or fearful during this stretch is the most common dog in the training home, because the window for fixing it is short and the family usually calls at ten months, which is the right time.
- Six to eight months: structure, the line, no freedom
- A year: freedom earned back for most breeds
- The slow breeds: the line held longer
- Reactive or fearful at ten months: the right time to call
The Houston factor
A spring puppy's adolescence lands in the fall, and the dog park is everywhere.
Most Houston puppies come home in spring and summer, so adolescence lands in the fall, when the weather finally allows the long walks and the trails, and the family takes a seven-month dog to Millie Bush or the Heights trail at the exact moment it is least able to handle it. Our trainers see more adolescent dogs in October than in any other month for that reason. The autumn is the right season to do the work, on the Bridgeland paths and in the store aisles along 290 at a distance the dog can hold, and the wrong season to test it at a busy park. Summer adolescents get the same structure indoors and at dawn, and a hot, under-exercised teenager is a harder one.
Expect it at six months and do not take it personally
The leash and the long line back on, and no off-leash time until the recall returns
No dog park, no greetings on leash, no couch, for the duration
The structured walk rebuilt from a standstill if it has slipped
Place with duration at every meal and every arrival
Fear periods met with distance and calm, never force
A call at the first lunge or the first growl, not the tenth
The program
The adolescent stay exists for this month.
Adolescence is when most dogs come to the training home, and the programs are built for it: Gold, two weeks at $2,500, for the adolescent that has simply stopped listening and needs the foundation reinstalled with field trips and a go-home session; Platinum, three weeks at $3,750, for the one that has become reactive, fearful or pushy, with behavior work and unlimited lessons afterwards through the rest of the teenage year. The adolescent board and train page and the regression guide on this site describe the stage in detail, and the free phone consultation is where our team asks how old the dog is and what stopped working.
The programs
Programs for the teenage months.
Gold for the adolescent that stopped listening, Platinum for the one that turned reactive or fearful, lessons at home to hold the line.
Asked and answered
Questions people ask about this.
Why did my puppy forget its training at seven months?
It did not forget; it is testing whether the rules are real, with an adult body, new hormones and a sudden interest in the world. Put the leash and the long line back on, shrink the distances, keep the rules exactly where they were and wait it out with structure. Most dogs come out the other side by eighteen months.
How long does puppy adolescence last?
From about six months to eighteen months in most dogs, shorter in small breeds and to two or three years in the giants and the guardian breeds. The length depends on the breed; the outcome depends on whether the family held the line through it.
Should I give my adolescent dog more freedom?
No, less. Freedom is when the bad habits get rehearsed, and an adolescent allowed off leash and into the dog park learns in six months what takes two years to undo. Freedom is earned back a piece at a time as the recall and the manners return.
Is adolescence when reactivity starts?
Usually, yes. The new interest in other dogs and strangers, plus a leash and a bit of fear, produces the first lunge at seven to ten months, and that is the moment to act. A reactive adolescent is a short project; a reactive three-year-old is a long one.
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Hold the line; the puppy comes back.
Tell our team how old your dog is and what stopped working. The free phone consultation is a direct call.