I had initial success with my 28-month old boy using N75. After the initial progress, he regressed significantly, especially with #2. I tried the potty bell and the gate, but he is perfectly happy talking to himself in the bathroom. When told to poop, he pees, but no poop. I can't keep him there for hours. When told to go to the potty, bell or no, his first response is to run away. When I finally get him on the potty, he sits a minute, piddles, and won't go anymore. He peed through his underwear right next to the potty, looking at me. It felt like defiance. He has #2 accidents right after potty time! Thoughts?