K.H.
We also had a hard time with our son; what we finally did was start a "Poopie Chart" and every time he pooped in the potty he got a sticker; after 5 stickers we went to the store and he got a small toy; we also gave him the option to wait until a few more stickers to get legos. It wasn't easy but we finally got there! We always made a big deal about him putting a sticker on his poopie chart and we never took stickers away; we didn't do any sort of negative reinforcement but rather explained that accidents will happen and we just need to be more aware next time. It got to be a really big boy deal to him to be able to put a sticker on his poopie chart - it made him feel good and like a big boy.