I noticed yesterday morning she was sitting with her head tucked in, fluffed standing up asleep while the other were going about their normal stuff. On examining her her crop was very large and squishy. I massaged her crop and she brought up a lot of moucousy fluid and some grainy sloppy food. This didn't,t smell particularly bad although i expected a sour crop. I noticed her having a drink a few times but still sleeping most of the time. This morning the crop was still enlarged but not as much as yesterday but she is getting very thin and still making no attempt to eat. I have used a dropper to feed her a little natural yoghurt and some olive oil. But not sure if this is the right thing to do or how much she should be having. Any advise appreciated about what could be wrong or what to do to help her feel better?