This may be because the dog has smelled something delicious, or the dog is hungry, needs to urinate, and wants to go to the toilet, so it keeps knocking on the door hoping you will take it out. Parents should not be lazy at this time and find it as soon as possible. The dog's appeal, otherwise it may cause bladder rupture if it holds its urine for too long.

Tip:

Dogs cannot speak and can only express their inner thoughts through their own actions, so parents should learn more about dog behavior so that they can get along better with dogs.