Dogs can be unpredictable. At some point, you may find your dog getting into a fight with another dog. Maybe at a dog park, on the street during a walk, or even at home with a sibling. All dog owners should be aware that this could happen at any point, even if their dog has a timid temperament, and be properly educated and prepared.
Signs of dog aggression can be easily determined if you know what to look for. In most cases, not all, before a fight breaks out one of the dogs involved will show some sort of sign of aggression.

Stares – If a dog is staring at another dog intensely, this can be a sign that the dog has a problem. If the staring continues for more than a couple seconds, it is best to get their attention and remove them from the situation.

Posture – Standing stiff, head bowed, baring of teeth, popping of the chest to appear bigger, or even mounting are all signs that the dog is showing dominance.

Growls – Whenever a dog growls, it is an immediate sign that they feel intimidated. Once you see a dog growl at another dog you should intervene.

In the case of an actual dog fight, they can be quite scary. Depending on the specific dogs, and the intensity of the fight, it is important to first observe body language. Does one dog seem more aggressive than the other? If so, you should automatically start with them to begin breaking up the fight.
Do NOT scream repeatedly unless calling for help. Use a firm voice when telling the dogs to “STOP” or try making a grunting noise. Unfamiliar noises can sometimes grab the attention of the dogs.
Grab the dogs back legs starting from the hips and lift up (like a wheel barrel). This can startle the dog and help release the dog’s mouth from the other.
Grab collars. When doing so, only grab from the back and pull up. Any other way can possibly make the dogs think you are joining the fight.
Make loud noises. Try whistling, stomping, clapping, or even using an air horn.
Spray them with water if you have a spray bottle or hose nearby.
Get in the middle of them. Avoid sticking your hands in their mouths, this can cause you to get bitten. Try getting your body in the middle of the two to separate them and distract them from fighting.
Do NOT let dogs fight without intervening. Dogs who are fighting don’t always stop on their own. This can cause severe injuries.
With these helpful tips, you can be sure to maintain a safe and healthy environment for you and the dogs!