Dog
Puppy
Owl
Owlet
Giraffe
Calf
Rabbit
kitten, kit or bunny
Fox
pup, cub or kit
Kangaroo
joey
Sheep
Lamb
Goat
Kid
Duck
Duckling
Snake
Snakelet
Mouse
pup or pinky
Dolphin
Calf
Bear
Cub
Frog
Tadpole or polliwog
Monkey
Infant
Bat
Pup
Horse
foal, colt (male) or filly (female)
Cat
Kitten
Elephant
Calf
Rhinoceros
Calf
Wolf
cub, pup or whelp
Spider
Spiderling
Hippopotamus
calf
Lion
Cub
Mosquito
wriggler
Chicken
Chick
Pidgeon or Dove
squab or squeaker