Mr Ed Ray Livingston, Jay Evans

A horse is a horse of course of course
And no one can talk to a horse, Of course
That is, of course unless the horse
Is the famous Mister Ed!

Go right to the source and ask the horse
He'll give you the answer that you'll endorse
He's always on a steady course talk to Mister Ed!

People yakkity-yak a streak and waste your time of day
But Mister Ed will never speak unless he has something to say!

Oh, a horse is a horse of course, of course
And this one'll talk 'til his voice is hoarse
You never heard of a talking horse?

Well, listen to this:
". . . I am Mister Ed!"