Hi Brady, welcome. I havent yet had this happen, however, what type of bedding is in the coop/brooder, can he get a foothold, has he been dropped by accident?
Please someone correct me here if you have a better way but I would do a splint as they do for birds.
Get some gauze from ist aid box, wrap this around only once. leave foot free. get a small stick which is measured from top of leg to ankle, not to ground.
lastly wrap some thin plaster bandage, the sticky white bandage. You may have to slice this in half to make it thinner. Then keep this on for 3 weeks and keep watching for sign of movement in the foot. When he starts to bear weight you can remove the splint but still keep the bandage on.
Have you got a closeup photo of the leg?
Make sure the floor isnt slippery.
Newspaper bedding can break legs from slipping.
Use pine shavings or hay if you havent done so.
I really hope he/she gets better soon.
Dont worry, unless its a rooster, a leg injury will not affect his/her way of getting around once it has healed.