I was given some broilers a few months ago, never have had broilers. Let them run with my flock for a couple of weeks and noticed one of them had lost a lot of weight. Before I knew it they had all died. I assumed it was the breed. My flock free ranges, broilers are big meat birds. I just assumed I did not provide what they needed. Well.... now one of my Good Rhode islands is following suit. I noticed a couple of days ago that she was limping. Picked her up and she has zero muscle mass on that leg. It's all bone! She's lost a lot of weight. I have never had a bird illness if any kind. What am I dealing with? Is it going to wipe my whole flock out? How do I treat it? I have chicks upstairs in the brood room. They are separate, but it's attached to the coop. What do I need to do!? Anyone????