Cats are complex and intelligent creatures, capable of many more depths than most of us realize. This higher level of cognitive processing provides felines with a wide spectrum of sensitivity and emotion. Unfortunately, not all these emotions are positive ones, leaving our feline friends subject to many familiar feelings like stress, fear and anger. If you’re experiencing emotional difficulties with your cat, a great place to start figuring out your cat’s behavior is with the H.I.S.S. test. It stands for health, instinct, stress and symptoms, signs and solutions, and can help you to make a grumpy cat happy again.