Try using dawn soap and water to clean the coop. outside of that there was a post about 2 days ago that seemed to work real good cant remember who from right now but take a look it may help
If the droppings are coming out as you say it sounds like a gut problem. You need to take her to a vet and get her checked out. The sooner that is done the better her chance for recovery. Good luck
Vaseline is in my exp. one of the best things to use it will take a while to git rid of the mites. Keep putting the vaseline on their legs till the scales recover as for dish soap you can use a soapy water solution to clean the coop and remember the roost
The best I can tell from the photo is that it does appear to broken. If it is all you can do is tape the toe straight if she will let you. Be gentle doing so as not to hurt the little girl. Outside of that keep an eye on her and a lot of TLC never hurts
Goldie had the same problem. with alot of care and about 6 weeks of working with her she was walking on her own with a limp. Her leg never fully recovered but she was not in pain and lived a good and very loved life to the end. So stay positive and please keep me informed.
Different people have their own opinions. I have had good success with probiotics even when I had chickens on meds.
Hope the opinion helps you good luck