Sorry. I don't know how long but I wanted to ask if you've listened to her lungs for any wheezing or rattling? You may have already said but I can't remember. I had a hen that looked like that once - and acted the same - and I took her to the vets and got her some baytril which did the trick. She had repiratory issues. I think you can order baytril through Peter Brown's webiste. Baytril works wonders if it's a bacterial thing. Keeping my fingers crossed for Rosemary. Poor girl!!