I'm glad someone asked this question, because Parker started doing this last week too. And come to think of it, he turned 16 weeks last week. I know I still have a way to go in the potty training, but he really was doing good. He at least knew where his area was and went there Most of the time. And he ALWAYS pooped there. Then he just started being lazy, going where ever he felt like it. So I guess I'm going to try limiting his space until he gets back on track...he's not going to like that though