I've been doing EC with my son since 4 months. Now at 11 months he will pee on the potty 1/2 the time but won't poo on the potty. He prefers to stand to pee which is ok with me and will sit on the potty if I read to him, but he won't poo on it. When he gets off the potty he will go somewhere and squat & poo. If he's in his diaper he will poo multiple times. If he's not in a diaper he seems to be able to get it all out in one shot. Any tips for getting him to poo in the potty again?