Also had a hen who couldn't walk and just sat around all day. I mixed crushed calcium with yogurt and feed to make a mash. Then I fed it to her, in the hopes that the calcium would strengthen her bones. It worked after 3 days, and she is fine now.
However, I don't know if calcium would work in...
Oh dear. I'm not sure what you can do. What sort of vitamins do you feed him?
What about extra calcium, do help fix the bone?
Tagging someone to help ya out.
@Wyorp Rock
Is the limp pretty bad currently?
I had a hen who injured her leg - we put a popsicle stick splint on it for a couple days, but it didn't do much. Fast-forward a year later, and her limp is gone. Weird. Out of all my leghorns, she's the last one standing!