Here is how the song goes:

Oh where, oh where
Has my little dog gone?
Oh where, oh where can he be?
With his ears cut short
And his tail cut long Oh where, oh where can he be?

I think he went there
to the river side
under the willow trees,
A place so nice
So shady and quite
Where you can listen to bees.

Oh where, oh where
Has my little dog gone?
Oh where, oh where can he be?
With his ears cut short
And his tail cut long 
Oh where, oh where can he be?

I think he went down
into the town park
where children used to play!
They love to play tag
and he likes to bark
until the end of the day.

Origins:

This nursery rhyme is based on an old german folk song called “In Lauterbach hab’ ich mein’ Strumpf verlor’n”. The lyrics wrote the American songwriter Septimus Winner in 1864. The additional lyrics by matmoti.