What do animals eat?

According to Grace, this is what animals eat:
Bears = bear food;
Penguins = snow;
Grace = cookies;
Mommies = their own cookies;
Whales = a whale ate Marlin;
Tigers = grass;
Lions = grass, too;
Elephants = their own water;
Giraffes = leaves and hay;
Ostrich = nothing;
Cats = catfood;
Dogs = dogfood and bones;
Daddies = their own cookies;
Sharks = snibbers;
Polar Bears = fish;
Hippos = drink water instead, grass;
Parakeets = parakeet food;
Snakes = snakes, bad ones