Neonatal maladjustment syndrome (NMS) is a syndrome where newborn foals exhibit uncommon behaviors, occurring in three to five percent of live births. These behaviors can include aimless wandering, hypersensitivity to loud sounds and brightness, weakness or coordination issues, and the incapability to nurse. Neonatal maladjustment syndrome is often referred to as dummy foal syndrome by the equine community due to the aimlessness of the foals, nicknaming them "wanderers" or "dummy foals".