Here is my idea. Sorry that it is unclear, but the 2 holes that are smaller and closer together are for her feet, and the other larger ones are for food and water. I am trying to show that it looks like a "hammock" or something. I hope I have been helpful.
so she was stuck in the feeder. was it her whole leg just around the ankle. the ankle and hock and leg are the must easily broken part of a chicken. i would asume that if unfortunately it is broken its just the one part of her ankle.given she can move it up underneath her if you use mac14's good idea you will want to splint it so it stays in one spot. though i would add another hole so she dosent have to sit in her droppings.
First pic is of the feeder.
Last pic is the top part where you load it. It was almost empty and she fell in I guess. Its pry 2 feet deep with plastic sides.
There are many threads about Bumblefoot and all sorts of other problem (and solutions) in the BYC archives.
A nice warm soak salt water will ofter do wonders for a limping chicken and once you get them into a basin they will usually stand there as long as you want them too if you cup them gently. over their wings. I soak both feet so I can compare. Once the feet are soaked, clean and dry them you can look at it to see if she has something going on with her feet. BTW, I usually take the opportunity to oil the feet and comb. I use vit E but really any edible oil will do.