Your 7 to 8-Month-Old Dog

Something happens around this age that almost every owner experiences and almost nobody is warned about properly. A dog that came when called at five months stops coming. A dog that walked reasonably starts pulling. The sit that was solid in the kitchen is suddenly optional. It feels like the training has come undone, and it is the point at which a great many people are told their dog is being dominant, stubborn or spiteful.

It is none of those. The best evidence available on this is a longitudinal study of guide dogs by Asher and colleagues, and what it found is oddly specific: around adolescence — at approximately eight months in that study — carers rated their dogs as less trainable than at five months or at twelve. But the dogs' professional trainers rated the same dogs as being more trainable at that age, not less. And when obedience was tested directly, the dogs responded less to a cue from their own carer while responding better to the same cue from a stranger.

So nothing has been lost. What has changed is the difficulty of the test — a much more interesting world, a body that can act on that interest, and a relationship going through something. The training principles do not change at all. What has to change is the level you are asking at.

Two caveats worth carrying. That study followed guide dogs — German shepherds, golden and Labrador retrievers and crosses of them — rather than a cross-section of pet dogs, and it says plainly that the age groupings would need reconsidering for different breeds. So treat eight months as where a measurable dip was found in that population, not as a date your dog is due on. When adolescence arrives, and how obvious it is, varies by breed, by size and by the individual animal.

• Reliability dropping is expected here. It is not evidence that the earlier work failed.
• The dip is temporary — in that study dogs were rated more trainable again by twelve months.
• Lower the difficulty rather than raising the pressure.
• This is the worst possible moment to increase a dog's freedom.
• Nothing here is a reason to punish a dog, and punishment at this age tends to cost you the recall you are trying to rebuild.

Three things arrive at once. The environment has become genuinely more compelling — other dogs, scent, movement, distance. The body can now act on that: this is a dog that can cover ground, get through a gap and be forty metres away before the thought has finished. And the attachment relationship itself is doing something.

That last point is the one worth sitting with, because it is where the evidence is most interesting. The reduced responsiveness in the Asher study was directed at the carer specifically, not at people in general. There is also a reported association between separation-related behaviour at eight months and lower obedience to the carer at the same age — which reads less like a dog that has stopped caring and more like one whose relationship with you is the thing under strain.

The practical consequence is that pushing harder tends to make it worse, and that the answer is more reinforcement and less confrontation rather than the reverse.

This is the section that matters most at this age, and its whole content is one instruction applied in several places: when reliability drops, lower the difficulty. That is not a retreat. A behaviour rehearsed successfully at an easy level is being strengthened; the same behaviour failed repeatedly at a hard one is being weakened, and the dog is also learning that your cue can be ignored without consequence.

Nothing on this list produces a reliable dog by nine months, and treating any of it as finished is how the next six months go badly.

• Go back a rung, deliberately. If recall fails in the park, it is not a park behaviour yet — take it to the garden, then the quiet end of the road, and build back up.
• Rebuild recall on a long line so that it can never fail without consequence and never be tested before it is ready. A recall you cannot back up is a recall you are teaching the dog to ignore.
• Raise the reinforcement, considerably. What worked at four months does not pay for coming away from another dog at eight. This is the age to be generous rather than principled about it.
• Shorten sessions when the dog is wound up. An aroused adolescent is not learning much, and stopping early is a training decision rather than a failure of one.
• Generalise again from scratch. Cues that transferred easily at five months may need re-teaching in each context now, and that is ordinary rather than a sign anything is wrong.
• Manage the environment so the dog cannot practise what you do not want. A long line, a closed door and a bit of distance do more this month than any correction.
• One set of rules across the household. Inconsistency was survivable at four months; it is expensive now.
• Do not punish deterioration. It does not restore the behaviour, and it costs you the willingness to come back to you that recall is built on.

Lead work and recall, built properly

An adolescent looks adult, and it is tempting to give it adult freedom — off the lead in open space, out of sight in the garden, loose near a road. This is precisely the period in which that goes wrong, because the dog's interest in the world has outrun its willingness to check in with you.

The useful principle is that freedom follows demonstrated recall rather than age or size. If the recall is not working today, today is not the day for the unfenced field. A long line lets you give a dog space without giving it a choice you cannot influence, and it is the single most useful piece of equipment of this stage.

Be sceptical of a good week. Adolescent reliability is intermittent by nature, and one successful outing is not evidence of a pattern — it is one data point among several that went the other way. The dogs that end up in trouble at this age are usually the ones whose owners were persuaded by a good Tuesday.

• Recall first, freedom second, in that order and not the other one.
• Use a long line where it is appropriate and permitted, rather than hoping.
• Doors, gates and car doors deserve active management. Confidence has arrived; road sense has not.
• Wildlife, livestock and other dogs are the three things most likely to beat your recall. Plan routes accordingly.
• Local rules on where a dog may be off-lead vary by municipality and are worth actually checking.

What municipalities regulate, and how much it varies

Interest in other dogs typically increases at this age, and so does arousal around them. A dog that used to walk past another dog may now pull, vocalise or fixate — which is frustrating rather than sinister, and is usually about excitement and poor impulse control rather than anything darker.

The instinct is to let them greet, or to head for a dog park to burn it off. Both tend to make it worse. Rehearsed excitement on approach teaches a dog that other dogs mean an explosion of activity, and a busy dog park is a room full of strangers with mismatched play styles and no supervision. The more useful currency at this age is neutrality: being near other dogs, calmly, without interacting.

Good social experience still matters. It just looks like a walk alongside a known, well-mannered adult dog, or sitting at a distance and being paid for noticing another dog without reacting — rather than an hour of unsupervised free-for-all.

If something genuinely new appears — a dog that was fine with something and now finds it frightening — treat it as an individual change rather than a phase to wait out. Reduce the pressure, increase the distance, and rebuild the confidence gently. If it is severe, persistent, or getting worse, that is a conversation with your veterinarian and, if appropriate, a qualified behaviour professional rather than something to push through.

Reading the dog, and what good exposure looks like

An adolescent can do more than a four-month-old, and the temptation is to solve the behaviour with mileage. It rarely works: a fitter dog is a dog that needs more the following week, and exhaustion is not the same as satisfaction.

Vary it instead. Sniffing, exploring, new surfaces and problem-solving tire an adolescent in a way that repetition does not, and a walk where the dog gets to make decisions does more for the relationship than one where it is marched.

Physical maturity has not arrived. Growth plates take longer to close in larger dogs than smaller ones, and repetitive forced exercise — running alongside a bicycle, long stair sessions, throwing a ball until the dog drops — is still the thing to be careful with. Building endurance deliberately is a conversation to have with your veterinarian, in the context of how big this dog will be.

The question that arrives at this age is when to move to adult food, and the honest answer is that the trigger is skeletal maturity rather than a number of months. Merck puts that at roughly eight to twelve months in small and medium dogs and, for some large and giant breeds, closer to fifteen or sixteen — so a dog of this age is at the earliest edge of it if it is small, and nowhere near it if it is not.

Ask, rather than deciding. And in the meantime the useful skill is body condition rather than quantity: ribs that can be felt without pressing hard, a waist visible from above. Adolescent appetites swing, and adjusting against the dog in front of you beats adjusting against a chart.

What the label does and does not tell you

Merck puts the full set of permanent teeth in place by about seven months, so for most dogs this is the far side of teething rather than the middle of it. Chewing usually continues — it is a normal thing for dogs to do and a useful thing to give them — but it should no longer be the dominant fact of the household.

What is worth raising rather than watching: a baby tooth still in place beside its adult replacement, a broken tooth, or a mouth that seems sore. Those are veterinary questions and this is a reasonable point to have the mouth looked at properly.

The mouth you are looking after for the next decade

If your dog was going to be neutered early it usually has been by now, and if it is a larger dog it usually has not. The American Animal Hospital Association's guidance splits on projected adult bodyweight at 45 pounds: below it, around six months for castration and before the first heat for spaying; above it, waiting until growth is complete, which it puts at usually nine to fifteen months for males with a wider individualised window for females.

So for a bigger dog this stage is the run-up rather than the decision point, and there is no need to bring it forward because the dog is being difficult. Adolescent behaviour is not by itself a reason to neuter, and the guidelines are explicit that findings in one breed may not transfer to another — which is why this is a conversation with your own veterinarian rather than something to settle from a table.

One thing worth separating: adolescence and sexual maturity are not the same thing and do not arrive together on a fixed schedule. When an individual dog matures depends on its size, its breed and itself.

Why the timing question has changed, and what to weigh

There is often no routine appointment in this window, which makes it worth being deliberate about the things that would otherwise wait. The mouth, now that the adult teeth are in. The neutering plan, if it is still open. Weight and body condition, because adolescent growth and adolescent appetite do not always move together.

And behaviour, if something is genuinely worrying you. A sudden change — new fear, new reactivity, a dog that is off in itself — is worth mentioning rather than filing under adolescence, because “it is just his age” is a comfortable explanation that occasionally hides a physical one.

Choosing a practice before you need one

A dog covering more ground, in longer grass and further from paths, has a different exposure profile from the one walking round the block six months ago. The plan should follow that rather than the postcode alone.

It is worth checking the dates rather than assuming continuity, particularly at the ends of the season: heartworm prevention is seasonal in most of Canada and follows the local mosquito season, and tick activity runs longer at both ends of the year than most people expect.

Region and season, and what actually drives the timing

The risk profile at this age is dominated by one thing: a dog that can move quickly and decide independently, attached to a recall that is not currently dependable.

• Roads, and the gap between a dog that has never run into one and a dog that will not.
• Doors, gates and car doors — the three places an adolescent gets loose.
• Wildlife and livestock, which will beat your recall on the day it matters.
• Swallowed objects, still a real risk in a dog that chews.
• Identification: a collar tag that is current, and a microchip registration in your name with a phone number that works. This is the age at which it gets used.
• Off-lead spaces chosen for their boundaries rather than their convenience.

The most useful thing to know about this period is that it is a phase rather than a new baseline. In the Asher study the dogs rated least trainable at eight months were rated more trainable again at twelve, and the effect was strongest in dogs whose attachment to their carer looked less secure — which is an argument for spending this period building the relationship rather than testing it.

Nine and ten months bring the next part of it: more physical maturity, the later reproductive decisions for larger dogs, and the beginning of the shift towards an adult routine. None of that needs anything from you today beyond continuing to make coming back to you the best available option.