Cheez-it has a thing for tree-roots. There is a single tree in our normal potty-spot that has roots exposed above ground and he cannot help himself but to stop and chew them. Sometimes seperating a root and chewing it so it appears he is eating something. At night when I cant particularly tell what he is doing and it seems that he is just eating things off the ground (mabye poop, who knows) and he refuses to stop until I come over and pick him up because no manner of slight tugs on the leash will stop him.... Oh it drives me insane. He also gets real nasty when I pick him up as if to say "What are you doing? Cant you see I was busy there?" with a growly smirk on his face. I literally get angry lol. How about your pooch?