is a specific kind of: offspring, young.

is a broader term that covers: baby | pup, whelp | wolf cub, wolf pup | cub, young carnivore | kit | suckling | calf | calf | kitten, kitty | foal | piggy, piglet, shoat, shote | heifer | bullock | lamb | fawn ... show more.

is a member of: class Mammalia, Mammalia.