IMO I would Keep giving her that olive oil soaked bread as often as she will take it. I did have one that seemed like something was stuck and this really helped but it took a few days of giving it to her. And keep cold water for her as well. If she is jumping up on the roost then there is some time to figure out whats wrong but if she starts laying on the floor puffed up then she is getting worse. When they start feeling really sick they don't roost anymore but just huddle in a corner. Not sure what else you can do but hopefully someone here has had the same thing and can help you out. GOOD LUCK! HOpe she improves for you!