Why dogs do it
My dog doesn't get along with my partner's dog
Two people move in together, or start spending weekends at each other's place, and the dogs did not sign off on the arrangement. Stiff stares in the hallway, a scuffle over a dropped crust, one dog glued to your partner's side. This page sorts out the likely reasons, how to tell them apart, what to do tonight, and when the situation needs more than patience.
Last reviewed October 4, 2026
Why they clash
Tension between two resident dogs usually has a trigger you can name.
Many of these pairings go wrong in the first meeting: both dogs on tight leashes in a narrow entry, nose to nose, with nowhere to turn away. Others start fine and sour around resources. A stuffed chew, the food bowl, the couch corner or a doorway can become a flashpoint, and some dogs guard a person, often the owner they arrived with, more fiercely than any toy.
Watch when the trouble happens. If it flares only near food, bones or one human, resource guarding is the likely thread. If it happens in tight spaces or when one dog is resting, space and fatigue matter more. Constant tension with no clear trigger, or a dog that suddenly turns grumpy after years of being easygoing, points toward stress, pain or a mismatch in temperament that deserves a closer look.
- Flare-ups near food or chews
- Guarding one particular person
- Trouble in hallways or doorways
- New grumpiness in an older dog
Tonight and next
Separate first, reintroduce on purpose, and get help after any fight.
Tonight, stop the rehearsals. Use baby gates, closed doors or crates so the dogs rest apart, feed them in separate rooms, and pick up high-value chews entirely. Walk them separately or with two adults, one leash each. Never punish a growl; it is a warning, and removing it can make a dog skip straight to snapping. If one dog seems sore, stiff or newly irritable, book a vet visit before blaming the relationship.
Once things are calm, our step-by-step guide covers the slow reintroduction method itself. If there has already been a fight that drew blood, a professional assessment comes before any more meetings; Behaviour Rehab works on aggression and accepts bite histories after a full assessment. For milder friction, a private session ($150 + GST) gives you a written plan for both dogs at home. The consultation points you to the lightest option that fits.
Asked and answered
The questions people ask us.
Why does my dog hate my boyfriend's dog?
Often it is not hate but competition or discomfort: over food, toys, space or the attention of one person. A rushed first meeting can also set a tense tone that sticks until the dogs are separated and reintroduced slowly.
How do I get my dog to like my partner's dog?
You cannot force affection, but you can lower the stakes. Separate the dogs at home, remove contested items, walk them apart, then reintroduce gradually with two calm adults and plenty of space.
Should I keep two dogs apart after they fight?
Yes, keep them fully separated for now and do not let them meet loose. A fight, especially one that caused injury, is a reason to get a professional assessment before any reintroduction.
Can two dogs who don't get along live together?
Some households manage it well with careful routines, separate feeding and supervised time together. Whether it is safe for your pair depends on what is driving the conflict, which an assessment can help clarify.
Keep reading
Two dogs, one household
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