If your dogs have fought, prioritize safety rather than making them settle it themselves. Keep them apart behind secure doors or barriers. Do not put your hands between fighting dogs or grab collars in the middle of a fight; you can be bitten. After any fight, keep the dogs separated and contact your veterinarian promptly for advice and an examination of each dog that may have been bitten, even if no wound is obvious. Seek urgent veterinary care for bleeding, breathing problems, weakness, or significant pain; seek human medical care for any human bite or injury.
Prevent another flashpoint
Feed separately behind closed doors and remove bowls before reuniting. Give high-value chews and toys only in separate safe spaces. Note where tension happens, including beds, narrow paths, or attention from people, but do not test these situations to collect data. Children should not manage or approach dogs in a guarding conflict.
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Find the cause with help
Not every household conflict is about a food bowl. Pain, illness, fear, and changes in the dogs' relationship can matter. A new or escalating conflict needs a veterinarian and a qualified behavior professional to assess both dogs and make a plan. Separation is a safety measure, not a failure; do not force contact because the dogs used to get along.