hmmm...
"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 Mr Ed."
"Go right to the source and ask the horse,
he'll give you the answer you endorse,
he's always on a steady course,
The famous Mr Ed."
"People go yackity yack a streak,
and waste the time of day,
But Mr Ed will never speak,
unless he has something to say."
... oh crud...brain fart...forgot the last verse