DD1 (3.3) has been dry for nearly a year, but absolutely refuses point-blank to poo anywhere except a nappy. When we first started potty-training her, she had a couple of accidents at nursery and went through a period of not wanting to wear knickers, or just holding in her poo till she had a nappy on. She was diagnosed with coeliac disease in May, which affects the bowels, although with DD seemed to have more impact the other end IFSWIM, so I let things go for a while, but since she's been on a gluten-free diet, and therefore quite healthy, things haven't improved.
She simply says 'mummy I need a nappy to do a poo-poo in' and 99% of the time goes immediately and then gets dressed again. Which is all well and good whilst we're at home, but not so convenient when out and about. She doesn't do it at pre-school though. Every so often, either I or OH try to get her to go on the potty, but we just end up with a hysterical, constipated child.
She's impervious to reward charts/bribery with treats and it's difficult to with-hold day-to-day stuff with twins of 19 months to see to as well.
I have heard it's quite a common problem, but have no idea how to tackle it. Any ideas anyone?
TIA