What does it look like when a dog is angry?

When a dog is angry, it may show the following signs. First, if the dog is just a bit impatient or annoyed, it may bristle its fur, arch its back, tuck its tail or wag it rapidly side to side, widen its eyes with dilated pupils, show a sharp stare, and pace back and forth.

Second, some dogs may Huff or growl out of impatience, trying to draw attention or warn other animals. Finally, in extreme cases, a dog may attack directly, such as lunging at a target, biting a person, or attacking other animals. Therefore, when a dog is irritable, let it calm down for a while to avoid further stimulation.