We have been TT Tori for a good couple of months now and she has the weeing down pat, she knows when she needs to go and takes herself off to the toilet by herself. We are however having horrible trouble TT her for poo. She knows when she needs to go so asks for a nappy on, and if we try and get her to go on the toilet or the potty she gets hysterical and then holds onto her poo for another couple of days, which creates a whole new set of problems.
When she goes to poo, she will only go in her bedroom- she wont go in any other room of the house.
She also has toddler diarrhoea, so she has never done a formed poo- every poos is soft. She only goes once every 1-2 days.

Any ideas how we can encourage her to poo on the toilet/potty or should we just let her go for a while as she is only two and a half?