u/Careful-Comedian-165

My 3 and 4 month little boy is starting summer club at the school soon (where they need to be potty trained) but I cannot get it into his head that pooing needs to be done in the loo/potty. He’s ok when he’s not wearing anything on his bottom half but as soon as he has anything on his bottom half either pants or trousers he will poo and not tell me. Does anyone have any advice?