DD is nearly four. She happily wees in the toilet and rarely has accidents. She has never liked the potty. However she will just not poo in the toilet. She either asks for a nappy or she poos in her knickers. She will sit on the loo for 5 minutes but then refuses, gets upset, goes and hides and does a poo. I've tried sitting with her, leaving her alone (she is very private), bribery, the Mr Poo & Pooland app, I keep calm, explain to her why she needs to use the toilet. Nothing has worked and I am increasingly worried. Any advice gratefully received!