I got a cockerel about 3 months old, started limping, I thought it might have been an external injury. A few days later he just laid on the ground not moving after all. I could not find any external bleeding or bruise, it seems his legs were completely paralyzed. He could flap his wings only. I put him in a cozy nest with food and water, hoping he would recover, and he lived for a few more days and died. Now another adult hen started having the same problem, started limping and now difficult to stand up. I hate to loose her. Anyone with any expertise on this particular syndrome? I called our local feed store and an experienced chicken keeper said to try tetracycline, which I did, to no avail. Anyone has experience on this disease?