@Catsback I can't count myself as an expert in this at all. We realised my Dd has anorexia at the start of the month, and we started the 3 meals + 3 snacks the same day the dr sent off the referral to CAMHS. It's been really hard for us all, but I've learned to make sense of what's happening as us 'rattling the Ed' - so every time my dd is distressed or angry, I'm trying to see that's the Ed fighting against us. It's not easy though, we try and say the things Eva musby suggests like 'we know what your body needs, you can trust us' etc.
We've been trying to follow 3 meals at least 500 calories each, and 3 snacks of 2-300 each per day. My approach has been to try and keep portions small so they aren't overwhelming, but add things in like double cream, butter or oil to reach those calories. I don't let my dd see me cooking. I sometimes give her choices, but only choosing between two things where I know they have similar calories, I try not to negotiate about food otherwise. We try and ensure that she finishes everything, in the early days we were allowing her to leave a small amount on the plate, but this soon escalated to more and more, and now we have said she needs to eat everything she is given. She has become really sneaky and manages to find ways of discarding or hiding food so she can throw it away later.
We are focussing on weight gain, although she lost more last week so I've been trying to figure out how.
As far as I understand, this is what will happen in the first phase of fbt anyway, so I didn't think there was any use in waiting for someone to tell me that, I just thought it was better to get on with it...