My 15month old has always had issues with pooing in her nappy. By issues I mean she won't, or wouldn't for a long time. So for about 5 months she uses the potty, at first I would rush her to it when she made 'that' face but after a while she would happily say yes or no when offered.
Until a recent d&v episode which has led to a poo strike, she is doing her best to 'keep it in' and only seems to get a result when she really can't stop it!
I'm at a loss of what to do as now she won't poo in nappy OR potty!! Argh!!