Depending on the breed the other chickens may peck at it. Keep it in the house until it feels better and is getting around in as normal a way as possible. It may die of shock, but if that is going to happen it usually happens within hours, not days. I wish some one would give you advice that still raises chickens because my experience with chickens is many decades old.
I know absolutely nothing about chickens, this is just a suggestion.
Is the chickens leg broke, showing bone? A split bone is going to need a vet..or a butcher. If not, do you think that you would be able to splint it? You need to pieces of wood, wrap them in medical tape (for comfort). You can also use cardboard tampon applicators, or hard foam tubing(you can get this at a hardware store)Then if you can get someone to hold the chicken, tape the splint onto the broken leg, making sure that it is snug and straight. Do you have extra chicken wire? or a dog crate? Try to limit movement, and keep it away from other chickens to ensure that it isn't injured again. We found an injured goose once and this is what the wildlife officers did to help it.