can you put pics up of your run set up, or describe it well.
put a chair in the run and sit with them, scatter some mixed corn, if you have it, and sit and watch what they do.
what breed did you get and how old.
try to get some grit and oyster shell, pets shops sell it, I always used chick size. I had mine in a flowerpot with a tent hook through the bottom, when converted to concrete I had little hanging pots.