Really hope someone here has some ideas as I am at my wits end!
DS is 3.5, has been potty trained for about 8 months. When we started he got the idea of wees straight away but was very resistant to poos so we had a lot if accidents and a lot of him waiting until he had his pull-up on at night to go. We tried all the usual, reward charts, poo goes to Pooland etc but nothing really seemed to work, in the end I think he just decided himself to use the toilet. I was so relieved. Over the last few months, since he cracked it, we've had various times when he's reverted to pooing his pants but only for a few days and I've usually been able to guess why ie. we moved house, he started at pre school etc. few days and we'd be back to normal.
However for the last 2/3 weeks he started doing again, at least twice a day, sometimes more. It is not an accident as in he can't get there in time - he knows he needs to go and he knows he should use the toilet, he's just choosing not to. It's driving me insane and I just feel like such a failure, I just can't understand why he's doing it.
We've tried just ignoring it, cleaning him up without comment, I've trued telling him off, i've tried talking to him calmly about it at it other times - no difference. I can tell sometimes that he needs to go so I'll ask him and he'll say he doesn't so I'll just remind him to go to the toilet if he does and literally a minute later he'll tell me there's a poo in his pants.
I just don't know where to go from here - in all other respects he is a bright and articulate 3 yr old so I just don't know why this is such an issue.
As additional background, he does have a little brother who's 15 months so it wouldn't surprise me if jealousy/ attention seeking is playing a part, although I try to give him as much attention as his little brother (and he has one-to-one time during his brothers naps).
Sorry this is so long but any thoughts or advice would be very much appreciated as I'm really getting to the limits of my patience on this issue and I worry that my frustration with him over this is affecting our relationship.