A 3-year-old cat, named Whiskers, was presented to a veterinarian with a history of aggression towards people. The veterinarian used positive reinforcement training techniques to help Whiskers overcome her aggression. The veterinarian also provided guidance on environmental enrichment strategies, such as providing Whiskers with vertical space and hiding places, to reduce stress and anxiety. With time and patience, Whiskers' aggression decreased, and she became a more confident and relaxed cat.