Ok. After reading posts about wrinkled eggs and infectious bronchitis I have concluded that this must be what is causing my wrinkled egg problem. It seems to be only one of the 6 hens (possibly two). So now what do I do. Can I vaccinate them to prevent it from spreading? Will it get better if I vaccinate the affected hen? Can I vaccinate them myself and if so, where can I get the vaccine? Help! I'm new to this backyard chicken thing. We've only had them for about a year.