My daughter bought 4 easter eggs at a swap. It seems to be 2 hens and two roosters. They are just coming of age now. One hen had wry neck, got nursed back and but in with the regular chickens. Then two week later she dies under the ramp and I could see she was flailing with her feet. Now the other hen was flailing in the coop on her side. She was down for a while today and I could see she pushed chips every were spinning. I got her up and she couldn't walk. Stepping on her wing and all. I got her stable and she ate some and seemed a bit better. Now she si walking with a limp on the right leg and the wings are slightly droopy. and she still doesn't see right. Of the 4 chicks she bought this would be the second bad hen. I am not seeing anything transferred to the other chickens and we kept them separated for three weeks before putting them in with the main flock. I am wondering if these have a genetic condition, but making assumption. The rooster seem fine.