What do dogs do when they are mad?

Answer 1

I assume by "mad" you mean angry, rather than the British use of "mad"-- crazy or insane. If you are asking about anger issues, it depends on the breed. Some dogs will show their teeth and growl to exhibit anger or displeasure. Some will do the dog equivalent of sulking-- they will walk away, head and tail down. Many dogs will exhibit temporary anger or frustration, especially if they don't get their way; but if you distract them and get them involved in a new activity, they will usually move on. (Make sure you don't reward their anger. Wait until they begin acting appropriately and then give them a treat for being appropriate.) Research shows that dogs live in the moment much more than humans do, so what made a dog angry one minute can easily be forgotten the next. If you have a dog that is frequently angry or frustrated, you may need to contact a dog behavior specialist for training techniques to eliminate or minimize those emotions.

Answer 2

They growl and show their teeth. Their tail will go behind their back.

Answer 3

YES