When my Gwennie started showing signs of losing weight and also vision troubles, I decided to bring her in and separate her from the flock. I had no idea what was wrong with her. I researched everything under the sun to try to figure it out. I was at my wit's end looking and looking and trying to guess what was the cause of her troubles. The other girls seem just fine. I set up my brooder in the spare room in the house and put Gwennie in there. I gave her water with electrolytes and plenty of food and treats. She had up's and down's all week. I truly don't know yet if she will make it. She is down to 3 1/2 lbs. It all started about a couple of months ago. I noticed that Gwennie would always be shaking her head a lot. I thought nothing of it but decided to keep track mentally and watch her. The head shaking never stopped, even though she acted normally in every way. She is the lowest in the pecking order. I kept checking for lice or mites, but never saw anything. A couple of weeks ago, she began having trouble getting into the coop at night. After about a week of this, I decided it was time to bring her into the house. Her symptoms: Head shaking, head swerving to one side, sleepy, eyes always wanting to close, and sleepyness. I did some online research and discovered a local vet who advertises being a mobile vet. She does chickens!!!!! I decided to call and set up an appointment for Gwennie. The vet came last night and spent well over an hour with Gwennie and I. We came to the conclusion that Gwennie was suffering from an inner ear infection. We have antibiotics now and are treating Gwennie with those. I just wanted to say that even with all of the available info out there on the web, that sometimes, it is nice to have an opinion from a professional and not have to guess what the trouble is. I am keeping my fingers crossed for Gwennie. She will hopefully recover and I have learned a valuable lesson. That is, to take everything seriously that I see and not with a grain of salt. I do not want to let any of my girls suffer because I am not well versed in chicken health and now know that as with any animal, they often hide their symptoms until it is too late. Thanks so much to my local mobile vet and her wisdom. I just wanted to share.