Yep....I also have a "cow"

And like ChrisH said, Sierra has to look around for the PERFECT kind of grass to eat! She doesn't normaly puke it up.

Buddy, once in a while he'll eat grass, we are STILL fighting with hook worms with him, so I'm sure there's times his belly doesn't feel well, so that's why he eats it I'm sure.
But when he does he yaks it right up!