[header] How to keep dogs in the same house from fighting [title] Do not reward aggressive behavior. [step] Provide each dog with its own separate bowl, with plenty of space between them. If your dogs show signs of aggression while eating, you may even consider feeding them in different rooms. 
When feeding time is over, remove any uneaten food to prevent dogs from eating each others' leftovers. [substeps] If you provide a treat or bone, provide one for each dog.