Barking is your dog’s way of communicating. They bark when they need food, or when they’re angry. They also bark when they’re playing with you. However, some dogs just bark too much. They even do it in their sleep when they are dreaming. What do dogs dream about when they bark? We share with you why dogs bark in their sleep and what dogs dream about when they are sleeping. We also discuss whether or not you should wake your dog up from their sleep. Why Dogs Bark in Their Sleep Dogs bark in their sleep because they are dreaming.