A goat is a hoofed mammal in the genus 'Capra'. Most goats are referred to as 'domestic goats which are sub-species of the 'wild goat'. A male goat is called a buck or billy, and a female is called a doe or nanny.The goat is a member of the animal family Bovidae and the goat-antelope subfamily Caprinae, meaning it is closely related to the sheep.