The reasons why dogs are angry:

1. Some dogs are naturally manic and irritable. This is related to their breed and is genetically determined.

2. Dogs will also become particularly irritable during the estrus period because of the influence of body hormones and aggressive behavior.

3. Frequently shout at the dog in a raised voice, and beat and scold the dog when it makes a mistake, which will make the dog angry.

4. Dogs will also get angry if they encounter things that make them scared and nervous.

5. Dogs have a strong sense of territory and will get angry when strangers or dogs suddenly intrude into their territory.

6. If the dog is bullied outside, the dog’s self-esteem will be hit and it will become angry.