Unfortunately this happens everyday to me. People think it's quite the trick that I taught him but I didn't teach him at all. My 13 month old yellow lab named Taylor feels the need to back himself into a bush when he has to poop. He gets but so high up on the branches that sometimes his back legs aren't even touching the ground. He prefers cedar trees, I guess they smell better or something but it's really embarrassing to watch him get himself all situated. It gets worse. Sometimes he lifts only one leg like he's going to pee but he's really pooping. Maybe a bit confused. I've never seen a dog who feels he needs all this primping and posing and privacy just to take a dump