Here's the Talley version that someone mentioned upthread:

SHEEP AND GOAT
[Thomas W. Talley, "Negro Folk Rhymes", 1922]

Sheep an' goat gwine to de paster;
Say de goat to de sheep: "Cain't you walk a liddle faster?"

De sheep says: "I cain't, I'se a liddle too full."
Den de goat say: "You can wid my ho'ns in yo wool."

But de goat fall down an' skin 'is shin
An' de sheep spli 'is lip wid a big broad grin.