Down On Grandpa's Farm

This is a really fun song, but I don't have a tune to relate it to.

Down on Grandpa's farm there is a black and white cow.
Down on Grandpa's farm there is a black and white cow.
The cow, he makes a sound like this moo, moo.
The cow, he makes a sound like this moo, moo.
Oh, we're on our way, we're on our way,
On our way to Grandpa's farm.
We're on our way, we're on our way,
On our way to Grandpa's farm.

Other verses:
Big brown horse (neigh, neigh)
Loud brown dog (ruff, ruff)
Lazy white cat (meow, meow)
Fat Pink Pig (oink, oink)
Plump Red Hen (cluck, cluck)
Fluffy Yellow Chicks (peep, peep)
Pretty white ducks (quack, quack)
Wooly white sheep (baa, baa)

I altered this song to fit zoo animals.
Down at _________ (Zoo Name) Zoo
Be creative and make up sounds or actions for the animals you see. These are a few I came up with from our zoo:
Big White Bear (growl, growl)
Long Necked Giraffes (No sound for this one so I say "They always eat up high, way up high)
Black and White Zebras (They always run really fast, really fast)
Big Tan Lion (roar, roar)
Black and Orange Tiger (roar, roar)