M.M.
Dont worry! My son did the same thing. He would hide to poop. But it took him 1 year to pee in the potty and 2 years to poop in the potty, and one month to start to poop in the toilet. He is now five but i started on his training at 3yrs. Dont use pull ups, they use them like diapers. get cloth ones or regular underwear, let him pick them out and when he pees or poops tell him that he got his new undies wet and "spider man, Hulk, ect." doesnt like to be wet. Eventually it will kick in. But have a carpet cleaner handy. Boys seem to pee a lot with force when they go, lol. Big mess. Let me know how it goes. Frustrating, but he will get it. M.