Never have experienced this before and thought I would ask if any others have. Last Fall, I had a hen to hatch biddies pretty late it had already begun to get cold. All of the babies ended up dying. I feel from whatever the condition they had. Some of my birds are inbred, and I didn't know wheather it was a genetic condition, or disease. They could not walk very good. Those that could walk would just wobble around on their legs like they had rubber legs. I watched them closely trying to see exactly what was happening. When they walked their leg joint would bend either way! Very freaky! Anybody know what this condition was? I will be letting the hens start setting pretty soon and was wondering if I need to administer vaccines? If so, what kind of vaccines would help this? I would appreciate any advice. Thanks, Johnny