Well that would be thw thigh bone.
I don't know how you would address that position to help the chicken
I would use:
wet mash probiotic recipe as her food source
3 tbsp. of dry crumbles
6 tbsp. of milk
1 tsp of dry flax meal
1 tbsp. of plain yougart
and dissolve Vit E-100mg and Vit B Complex-crushed
and selenium crushed in the wet mash
mix good and to see if she will eat it twice a day as only food.
do this for two weeks as she will need that much time to heal
Then feed this to her twice a week for life.
if feeding other chickens use ths recipe without the vitamins,
by multiplying this amt times the amount of chickens to eat it.
feed twice a week for life.
Also put1 tsp of unpasteurized apple cider vinegar in 1 pint of water for her..
that will help her E.coli from the shock of the hit on her body.
I think you should put het in a dog crate or some where,
she can be free from other critters bothering her.
she needs that to be able to heal.
after the break heals she may walk again or limp.