The best way to deal with a fight is to not allow it to happen in the first place. Know your dog, understand canine communication, monitor situations carefully, and be prepared to intervene before stress, over-stimulation, or aggression, escalate into a full-fledged fight.
If, despite your efforts, a fight does break out, here are some guidelines to follow:
Both owners MUST get control of their dogs immediately. If one owner gets control of his or her dog but the other owner does not, this creates a very dangerous situation for the first dog and owner.
Grab the dogs from the BACK-grab either the tail or the hind legs. If a dog is involved in a fight, you should not grab the collar or put your hands anywhere near the dog’s head. A dog that is fighting is in a state of frenzy and is not aware of what it is doing. It may reflexively lash out and bite at anything that comes near its head. The safest approach is to grab the dog’s tail. If the dog has no tail, grab the hind legs. Both owners should grab their dogs and pull them away from each other at the same time. Then each dog should be leashed and IMMEDIATELY removed from the park.
Other owners should get hold of their own dogs. The sight of a fight breaking out sometimes incites other dogs to get involved.
Do NOT stick your hands into a fight between other people’s dogs. If you reach into the middle of a dog fight, you are likely to get bitten. You may mean to be helpful, but if you get bitten by someone else’s dog, that dog may end up in trouble with the legal authorities. Let the owners control their own dogs.