my dog had the same issue. I talked with my vet, and she said he could be doing it for a number of reasons. we determined that my pup was doing it as a cleaning habit. When we got him he was in a 6ftx6ft kennel, so he would poop, and eat it so he didn't have to have it in the kennel. What kind of "space" does he have, is there enough room for him to play and lay down without coming around the piles? How old is the dog, and did it recently start doing this, or has he always? it may have something to do with nutrition, but not always. The forbid and forti flora didn't help break the habit. The think that worked for us was to scoop poop right after he laid the pile, and eventually he just quit...