Dogs are typically powerful animals, so they break out of crates due to boredom, fear, or strong dislike of confinement. To accomplish that, they chew, scratch, or push the weakest part of the crate. When they make their way out of the confinement, they can become very aggressive, destroying things around the home or harming anyone in sight. Worse still, you may never see them again if you were not home when they broke out of an outdoor kennel.