My 5 year old son does not want to go to the toilet even if he has bowel movements and later he has to hurry. Occasionally he even poops to his pants (recently it happened to him in the kindergarden). You can easily recognize that he has bowel movements because he stops playing (or whatever is he doing) and lies on his belly and moves in specific way. We usually ask him in a mild way if he doesn't need to go to toilet but he almost always refuses.
He never complained about any pain during pooping. If he is late and you ask him why he didn't go earlier he says that he didn't know that he needed to go.
I tried rewarding him for going to the toilet but it worked only little and only for few days.
We didn't forced him to go believing that it is only matter of time but it does not improve and he is supposed to go to school next year.
What could we do to teach him to try to poop when he feels bowel movements?