Two of my girls have had or are having health problems. Penny, a red sex link, at about 5 months old seemed to develop overnight a neck that was tucked back off to one side and over several weeks slowly grew weaker to the point that she could barely walk. We took her in and hand fed her mash and vitamins (learned by reading posts here) and now the neck is almost back to normal (they are 8 months old now), but she still stumbles occasionally and her balance is still off, but still provides her egg everyday. I noticed last week that our little Easter Egger (same age) has started to have balance issues, tipping over if she lifts a foot to scratch her face and I even saw her run into a patio chair leg. She is sleeping on the coop floor because she can't balance on the perch. No problems with her neck though, so I have no idea if these are related issues or there is something contagious? Also, the EE had lice eggs and adults on her head that we have been treating. Not sure if that affects anything? Thanks in advance for the help.