These dogs can have some neurotic behaviors and can become anxious if left alone. If they are left alone, "crate-training" is important. Dogs who are crate trained do not mind the practice and often feel secure in a den-like setting. But being in an open house may make the dog agoraphobic, causing them to destroy things. Boxers are easily trained and want to please. While not aggressive, they will show some protective behaviors over their owners and families, especially children. Boxers do well with other dogs and pets such as cats, if they are properly acquainted and socialized. Because Boxers are very bright dogs, they may challenge an owner mentally by being defiant or by being openly obstinate. This type of behavior requires training and patience.