Reasons for dog fights:

1. Struggle for status. Dogs are social animals, and they still retain the nature of competing for leadership. They will fight to determine each other's status.

2. Competing for a partner. When a dog is in estrus and there is a female dog in estrus, multiple male dogs will bite, fight and fight for the right to mate.

3. Fight for toys and food. Some dogs are very possessive and will be irritated if their food and toys are snatched away by other dogs.

4. The instinct to protect the master. If other dogs want to attack the owner, the dog will show its protective instinct and fight with other dogs.

5. Jealousy. When the owner shows affection to another dog, the dog will become jealous and may come up to expel or attack the other dog.

Solutions to dog fights:

1. Separate the dogs. Grasp the dog from the rear end, lift the hind legs off the ground, and pull them away quickly.

2. Place items in the middle. Interrupt them by placing pillows or other objects in between to divert attention.

3. Spray with water. You can spray water on fighting dogs to stop them from fighting.

4. Sound leads away. You can try ringing the doorbell or shaking the jar with the coins inside to make a louder noise to stimulate the dog and divert the dog's attention.