Despite centuries of sharing our lives and homes with cats, many pet owners know very little about interpreting signs of anger, fear, or aggression in these creatures. The typical “Halloween cat” posture (arched back, raised fur, ears back, hissing) clearly indicates fear and/or aggression, but cats also use other postures and behaviors that are more subtle and easily missed. It may be impossible to avoid ever creating a hostile situation with a cat, but a few tips can help you (hopefully) avoid injury if you find yourself in such a situation.