Just turned 3 year old amazing at doing wees, absolutely refuses to do poos. Is massively withholding and has just been doing poos in pants for weeks now. On laxatives from doctor, tried bubble and balloon blowing, rewards etc but it doesn't seem to work. He just holds it until he can't anymore and I'm so sick of changing pooey pants! Any advice or words of encouragement/stories that your child did this then suddenly stopped...?