THE TEENAGE
YEARS

What adolescence is, and is not

Adolescence in dogs runs from roughly six months to somewhere between one and two years. Small dogs tend to start and finish earlier. Large and giant breeds can take longer, and some do not feel mature until two or three. These are loose ranges, and individual dogs vary.

It is a time of real body and brain change. Hormones shift, the body grows, and the brain is reorganizing. A dog in this stage may be bolder in some moments and more worried in others. They may test the rules you thought were settled.

It is not a sign that you ruined your dog, and it is not your dog being spiteful. For a closer look at the fearful side of this stage, read our page on the second fear period.

One honest note: the science on adolescence in dogs is still thin. A 2020 study in Biology Letters found that adolescent dogs were less responsive to their own person than to a stranger, with a peak around eight months. That fits what owners report, but it is one study, and more research is needed. Use it as a hint, not a rule.

Think of it as the stage between needing constant supervision and being a reliable adult. Your dog has real skills now, but they are not yet steady in a busy world. They need you to be a calm, clear guide while the rest catches up.

What you may see

• Cues that worked at four months now get ignored, especially outside or around distractions.
• More pulling, jumping, mouthing, and chewing.
• A recall that falls apart as soon as something interesting appears.
• New fear of things that never bothered them, such as the trash can or a person in a hat.
• More reactivity to other dogs, either barking or over-the-top greeting.
• Restlessness, frustration, and trouble settling.
• Accidents or marking in a house trained dog.

Not every dog shows all of this. Some barely blink. Others have a rough six months. Do not compare your dog to a friend's.

How to stay steady

Go back to basics and make it easy

Treat your dog like they know less than they did, because in a distracting world they do. Practice in quiet places and add distractions slowly. Pay well for the behavior you want. If your dog fails, the task was too hard. Make it easier.

Use long lines, not open fields

Recall is the first thing to slip. Keep your dog on a long line in unfenced spaces. Every time your dog runs off and ignores you, they practice ignoring you. A long line protects the habit you are building. Make coming to you the best thing that happens on a walk.

Give them outlets

Adolescent dogs need exercise, but running them harder does not fix the problem. Many become fitter, not calmer. Add mental work: sniff walks, chews, food puzzles, and training games. Read why in our blog on why more exercise does not fix behavior. Our sniff walk guide is a good place to start.

Protect sleep

Young dogs need a lot of rest. Overtired adolescents are mouthy, wild, and impossible. Plan quiet time in a crate or gated area every day, with a chew.

A simple weekly plan

You do not need a perfect schedule. Aim for a few short training moments each day, five minutes at a time. Pick one skill for the week, such as coming when called in the yard or waiting at the door. Practice in two or three places, and pay more when the setting is harder. Take one outing a week to somewhere new but quiet, and let your dog look around. End every session while your dog still wants more.

Keep a note of wins. Adolescence feels endless when you only count the failures, and a list of small improvements is proof that the work is landing.

What not to do

Some advice you will hear sounds firm and gets worse results. Do not get harsh. Leash pops, yelling, physical corrections, and pain-based collars do not fix adolescence. They add fear and conflict to a stage that already has plenty. We do not use them. Research on training methods has linked aversive tools with more stress behaviors, and a dog already unsure of the world does not need more reasons to be wary. See our force-free training page for what we do instead.

Do not give up on classes or socializing either. Keep outings short and positive. Let your dog watch the world from a distance and reward calm. If your dog is scared of something, do not force a greeting. Give them space.

Do not assume the stage will fix itself in every area. Some habits, like pulling and jumping, stick if they get rewarded. Stay consistent while the brain catches up.

Mouthing, chewing, and the vet check

Chewing can come back strong when adult teeth are in and the jaw is growing. Provide safe chews and rotate them. Our page on mouthy adolescent dogs goes into this in more depth.

Also be honest about health. A sudden behavior shift can be pain or illness, including growth-related joint problems in large breeds. If your dog yelps, limps, avoids touch, or changes fast, call your vet.

The spay and neuter question often comes up at this age. The research is mixed, and the best timing depends on the dog. Read our page on spay and neuter and behavior, then decide with your vet.

If you feel stuck, get help early. A few private lessons or a group class can keep a rough patch from becoming a habit.