So all my chickens are getting over (mostly) a bout with MG. They're all WAY too skinny. It's startling to see how much weight they lost, even though they were eating. Their diet is free choice layer crumbles, and scratch in the evenings. What can I give them to put on weight? I hate picking the poor things up and feeling all those bones sticking out, and i'm afraid that the babies will have permanent health issues if they don't get some weight on them.