Why do cats often leave food unfinished? Many cat owners have experienced this puzzling behavior. Domestic cats are well known for eating multiple small meals throughout the day, a pattern thought to reflect their evolutionary origin from the African wildcat (Felis silvestris lybica), a solitary hunter that repeatedly captures small prey. It has also often been assumed that cats leave food unfinished simply because they have a small appetite or a capricious nature. However, the mechanism underlying this characteristic feeding pattern has remained unclear.