Bosco is a fellow poo-eater. We got For-Bid from the vet. He still eats poo. Seriously, the only thing that keeps Bosco from eating it is if we pick it up before he has the chance to start snackin. Ewww I grossed myself out...
Anyways, I've read the poo-eating (theres a name for it...begins with a "c"...) comes from an old instinct to cover their tracks, so it's not necessarily a bad thing. Obviously you don't want him to do it...I'm just saying it's not a bad behavior and it doesn't mean he's missing nutrients from his diet (a popular theory).