What causes a dog to be irritable?

A dog’s irritability can be caused by genetics, environment, socialization, health, and other factors. First, some breeds are naturally bad-tempered, set by genes. In addition, the dog’s environment may affect its temper; living long term in noisy, crowded places may make it easily angered.

Also, a lack of enough training may make the dog disobedient and irritable. Moreover, when the dog has pain or health problems, it may also become agitated.