if "little" means "baby, very young", here are few: dog: puppy cat: kitten cow: calf horse: boy: colt; girl: filly; either boy or girl: foal cow: calf pig: piglet swan: cygnet duck: duckling whale: calf lion: cub fish: fry frog: tadpole bird: nestling goat: kid fox: kit seal: pup chicken: chick goose: gosling beetle: grub dragonfly: nymph fly: maggot other insects: larva sheep: lamb

I suppose a few would be dog: bark, ruff, arf cat: meow, mew cow: moo sheep/goat: baa chicken: cluck, cockadoodledoo bird: chirp, tweet lion/tiger/big, dangerous animals: rawr, growl snake: hiss, sss bee/insect: buzz, bzz Do you need any others?