Much like humans, animals experience a vast array of feelings and emotions. Pythagoreans long ago believed that animals experience the same range of emotions as humans (Coates 1998), and current research provides compelling evidence that at least some animals likely feel a full range of emotions, including fear, joy, happiness, shame, embarrassment, resentment, jealousy, rage, anger, love, pleasure, compassion, respect, relief, disgust, sadness, despair, and grief (Skutch 1996, Poole 1996, 1998, Panksepp 1998, Archer 1999, Cabanac 1999, Bekoff 2000).