DS will be 3 in May and we've been potty training for a couple of weeks. He's doing well with wees, usually goes on the potty/toilet without too much fuss, starting to show some awareness of when he needs to go and asking to go to the toilet. He likes wearing pants and isn't keen on having a nappy at night (he does still need it).
However poos have been much more difficult. He is withholding and getting constipated and then eventually soils himself. He has never successfully pooed on the toilet/potty and will have a complete meltdown when I (or anyone else) suggest he does his poo on there. The withholding is new and definitely training related, he didn't have any problems while still in nappies. When I can see him doing a poo he will categorically deny it, have a tantrum if I suggest the toilet and also won't entertain the idea of a nappy to have a poo in. I really can't think of anything else to try or how to help him!
Is this normal? Any tips for helping him with this transition?