Most puppies become teenagers at around six to eight months old. Small breeds tend to arrive there sooner, large and giant breeds later, and the adolescent stretch can continue well past the first birthday. Nothing is broken when it happens. Your puppy is growing a more independent brain, stronger drives, and a fresh interest in the world beyond you.
The changes owners notice first
Recall is usually the first casualty. A puppy who trotted back happily at four months may now pause, weigh the squirrel against you, and choose the squirrel. Loose-lead walking frays because other dogs, scents, and movement have become far more interesting, and greetings can tip from friendly into over-aroused lunging and barking. Chewing returns even though teething has finished, because adolescent mouths explore and relieve tension that way. Attention comes in short bursts rather than the eager focus of early puppyhood.
Why solid training appears to unravel
Adolescent puppies are not forgetting their training out of spite, and they are rarely being dominant or stubborn. Their reward priorities are genuinely changing: exploring, chasing, and social contact pay better than they used to, while the cues you taught have not yet been practised in enough exciting places to compete. Memory itself can wobble during this stage, so a cue that worked in the kitchen may honestly not transfer to a park full of dogs. Treating the regression as a training gap rather than a character flaw changes everything about how you respond.
Working through the teenage months
Shorten training sessions and raise the value of what you offer for check-ins, turns, and recalls, especially outdoors where competition is fiercest. Practise in gradually busier places rather than jumping from garden to dog park, and use a long line on open ground so your teenager can move and explore without rehearsing the run-off that feels so rewarding. Keep reinforcing the basics you thought were finished — settling on a mat, waiting at doors, trading stolen items — and add plenty of legal outlets for new energy: sniffy decompression walks, scatter feeding in grass, shredding boxes, and structured play with clear start and stop cues. Protect sleep, too. Overtired adolescents mouth more, bark more, and learn less, so enforced naps in a quiet crate or pen still earn their place.
Management while the brain catches up
Teenage behaviour improves faster when the puppy cannot practise the unwanted version all day. Close doors to rooms full of chewable hazards, lift shoes and remote controls out of reach, and provide sanctioned chews in the spots where chewing used to happen. Use baby gates and pens to separate your adolescent from small children or older dogs during the rowdiest hours rather than relying on willpower from either side. None of this is failure. It is scaffolding that comes down piece by piece as reliability returns.
When it is more than adolescence
Some changes deserve a closer look rather than a training plan. Sudden aggression that is new, intense, or aimed at family members, a sharp loss of appetite, marked lethargy, limping, or fear that is deepening week by week rather than easing all warrant a veterinary conversation, because pain and illness can sit underneath behaviour that looks like teenage attitude. A qualified behaviour professional is also worth involving early if your puppy is guarding food or objects with growling and snapping, or if walks have become frightening for either of you. Through it all, consistency between handlers matters more than any single exercise, and KinsLe's Care Teams let you assign your teenager's walks, practice sessions, and downtime to each person helping, with finished tasks marked by a timestamp so the whole household can see which rules were actually kept today.