Cats aren't well-known for their ability to guard a home. Although they may not respond to intruders the same way dogs do, cats still have distinctive types of body language to ward off unfamiliar intruders. Cats defend their territory in a way that is less aggressive than their dog friends. Scent rubbing and spraying are two key ways that they make their homes as secure as possible. For example, when cats rub their faces on furniture or walls, it is a form of marking that space of territory as "safe." This brave kitty faces an unexpected guest in her home, that she feels has invaded her territory. Although it's not a real threat, this video shows how territorial (and adorable) cats can be.