How to stop a dog from fighting at a dog park?

Correcting the aggressive dog (at the appropriate time) can prevent a disaster from occurring. Certain challenging postures (such as standing very erect, holding the head over another's back, direct staring eye contact and mounting) need to be corrected immediately by the owner. If these postures continue to persist, owners should keep an eye out to make sure that a fight is not ready to erupt. Make clear to your dog that this behavior is not desired. If your dog does get into a fight, try to remain calm and use whatever measured force is necessary to break it up. Be careful: breaking up dogfights can be dangerous. Avoid reacting hysterically and screaming at the dogs and the other people. Do not insert a hand or foot between the two rival dogs because their natural reaction may be to redirect the attack to you. Dogs may be our best friends, but their thought process differs from ours. Understand your dog as a dog.