Hmmm, can't help. Huey is 'officially' potty trained and will let us know when he wants out, but he still makes 50% of his potties (1&2) inside. Peepee I'm sure is marking, poopoo is probably because no one is home or we are asleep. So, at 4 years old, we still keep pads down and should own stock in 'Natures Miracle'.