That is pretty good. Here's a similar one I heard.
A ventriloquist is driving to his next gig when his car breaks down. He walks to a nearby farmhouse, and uses their phone to call for a tow. While he's waiting, he asks the farmer if he can have a look around the farm. The farmer says sure, and gives him the tour.
When they get to the stable, the ventriloquist decides to have some fun with the farmer. "How you hosss doin'? How's life here?"
"Oh, not bad," they say. "We get enough to eat, and don't have to work too hard. It gets cold in here at night, though. We could use some more blankets."
The farmer looks surprised, because his hosss have never talked before, but he doesn't say anything. They walk to the pig pen next, and the ventriloquist says "Hey pigs, how's life here on the farm?"
"Pretty good," say the pigs. "We could always use more slop, though."
The farmer looks even more bewildered. Next they approach the sheep pasture. And the farmer says, "Now, just so you know, them sheep are liars."