This situation may be caused by hearing some sound or smelling something. The dog's hearing and smell are much more sensitive than humans. It can detect some sounds and smells that we cannot detect, so it will growl. The sound comes as a warning, and parents can appropriately comfort the dog so that it does not fear.

Tip:

Generally, when a dog growls, it means a warning. If the growl is suppressed, the dog will actively attack. Therefore, parents should promptly attack when they find a dog growling. to prevent it from injuring passers-by.