Dog trainer Shannon Walker, owner of Man's Best Friend kennel and training facility in the Pacific Northwest, has outlined five signs that a dog feels safe and content in your home. These include physical signs such as soft eyes, relaxed ears, and a tail that indicates a relaxed, relaxed attitude. Food behavior is also a good safety indicator. The American Kennel Club notes that dogs sleep or rest most of the day, giving their sleep a valuable window into their emotional state. The sign of a happy and content dog is that it feels safe at home and seeks connection with its owner.