At 4 months your dog slept on your feet and came when you said their name. At 9 months they pull your arm out on every walk, chew the skirting boards and ignore you in the park. You love them, and some evenings you also sit on the kitchen floor and wonder whether you have made a terrible mistake.
That thought does not make you a bad owner. It is a common low point, and it tends to arrive in adolescence, exactly when the dog in front of you stops matching the puppy you planned for. Typing the word rehome into a search bar at 11pm is not a crime either. It usually means you are tired and out of ideas.
Why it often hits now
Adolescence comes with reduced responsiveness to the caregiver's cues around its onset, and responsiveness returns later in the stage. So the dog who seemed to understand everything at 6 months can look as though they have forgotten it all, and that is a real change in your dog rather than something you imagined or caused.
At the same time, the novelty has worn off, the dog is bigger and stronger, and the help everyone offered in the puppy weeks has quietly stopped. The gap between the dog you expected and the dog you have is widest right here.
The stage, or a genuine mismatch
We cannot tell you it gets better on its own, because nobody can promise that. Patterns your dog rehearses every day tend to stay unless something changes them. What you can do is look honestly at which problem you have.
It looks more like the stage if the hard parts are pulling, ignoring cues, jumping up, chewing and too much energy, and if there are still good hours in most days.
It looks more like a mismatch if the dog needs far more exercise, space or time than your life can give, every week, with no change in sight.
It looks more like a mismatch if someone in the house is frightened of the dog, or if the dog's needs are clashing with a baby, an illness or a job you cannot change.
It needs help now, whichever it is, if your dog has bitten, guards things with growling or snapping, or is frightened most of the time.
The honest options
Most owners in this spot have more than 2 choices. Here they are plainly.
Shrink the problem for 2 weeks. Pick the 1 behaviour that makes your days hardest, manage the rest with gates, a long line and chews, and work on that one thing in short daily sets.
Get help. A good trainer who uses reward-based methods can turn a vague sense of failure into a plan. Book a veterinary examination too if the change in your dog was sudden.
Change your life around the dog for now. A dog walker twice a week, a day of daycare or a friend who takes them on Saturdays can buy you room to breathe.
Rehome through proper channels. Start with your breeder or the rescue your dog came from, because many will take a dog back. Be honest about the dog's behaviour, so the next home is the right one.
Reward-based methods are the recommended approach for training and behaviour change. If someone tells you the fix is a harder collar or a firmer hand, that is not help for an owner who is already worn down, and it is not help for your dog.
Behaviour change is built from management plus reinforcement together. On a bad week, management alone counts: a closed door, a chew and an early night are a perfectly good plan.
Sudden behaviour change warrants a veterinary examination. If your dog changed quickly rather than gradually, rule out discomfort before you decide anything about the relationship.
Safety note
Whatever you decide, you are not failing your dog by thinking about it carefully. Keeping a dog you cannot cope with is not automatically the kind choice, and choosing a well-matched new home through a breeder or rescue is a decision, not a failure. Please avoid free listings and handing your dog to a stranger online. If you are struggling with your own mood rather than just the dog, talk to your doctor or someone you trust as well.
Tonight's version, in one line: write down the single hardest behaviour, manage everything else, and decide nothing big while you are this tired.