My oldest son was potty trained for #1 for quite some time before he mastered #2. He was older--3 1/2 years--so I don't know if this will work for you, but we were advised by a pediatric health care provider to keep him in underwear. When he had to poop he would tell us, we put him in a diaper, he did his thing, we cleaned him up and put him back in his underwear. I know a lot of people will say if he could do all of that why couldn't he just poop in the potty? Well, that's another story and a longer one. It's actually pretty common to be trained for #1 and have problems going #2 in the toilet. So that's what worked for us. I had friends going through the same thing who just went with the underwear and cleaned up big messes everyday. That did not seem fun to me and I'm not sure my son would've gone for that. I think he just would've held it and gotten very constipated.