A cat's gray matter shares a great deal of similarities to a human brain and thus can express different moods, explains Dr. John C. Wright. Like humans, a feline can experience happiness, sadness and rage, which can determine its personality in the long- and short-term.
It is realistic to assume cats experience a range of emotions based on their physiology. Cats are mammals, and their brain structures and the way their brain works, are comparable to the functions of a human brain. While the formation of complex emotions are not necessarily reached by cats, basic emotions appear a given when witnessing the varying reactions and moods of animals, specifically cats. Like humans, cats express their emotions in various ranges. While one cat might express its rage through withdrawal, another might act out in defense. It is always best to familiarize oneself with the personality of the animal to bond with it.