we have had a chick since December that at first seemed a failure to thrive now I'm not sure. It has grown slowly but steadily. She has never been thin before but has not even finished feathering and part of her underside is naked. She has in fact had quite a lot of breast meat. At this age she is about the size of an average 8 week old chick. Despite this she has been completely healthy. She is a chocolate cuckoo English Orpington. At this point I feel sure it's a pullet although her small size and such could of course make a cockeral develop slower. Mid last week she began holding one eye slightly closed. We looked and it appeared okay but we did treat it with terramycin opthalmic ointment. By Friday her eye was extremely swollen and she wasn't eating or drinking on Friday that we saw. Because of this we immediately pulled her into the house. We began supportive therapy including force feeding water and electrolytes and then Friday night after we had rehydrated her with a syringe we did the same with feed. Her eye in spite of the treatment had become massively swollen and ulcerated. Her eye was shut but not goopy on Friday and Saturday. Saturday she showed a little interest in drinking on her own and even in wanting the syringe of feed. She had been very lethargic on Friday so I was thrilled. She has no symptoms of respiratory illness that we've seen and now has her bad eye open. It was extremely hot to the touch on Friday and especially Saturday. We have been giving her shots of tylan 50 in addition to the eye ointment. There is no smell. Her bad eye appears to have some scar tissue or something on the lower half of it and I'm wondering if she was injured somehow or of this is a symptom to an illness that we need to worry about. Her other eye is now also being treated (completely separate so as not to cross contaminate it from the other) as she is holding it partially closed. It is not swollen nor red, hot, or oozing either. The first eye is still swollen and very red but not so hot as it was. I am worried she may have been having such trouble because she was half blind from her eye and that is why she rapidly lost a lot of weight between last Wednesday and last Friday. She is being fed a soaked wet show bird game bird starter for the high protein level with a small ammount of applesauce in the mix for ease of eating. I mix this up and then handfeed it to her with a spoon. I mix it very moist to supplement her water intake as she isn't currently drinking on her own she has problems finding it. Two of her hatch mates have died in the last month or two from unknown causes. Both very large healthy chicks. One had no symptoms we saw until she was suddenly dead. The other was unable to stand but not paralyzed and rapidly lost weight but continued to eat and drink until the end. Neither of them had any respiratory or eye involvement. We have never had any experience with Marek's disease, but it doesn't seem to fit to me. Help would be appreciated. Thanks. Also none of the rest of the flock have any symptoms of anything going on. Also the rest of the juveniles she was raised with are entirely healthy and active. Please let me know if you have any questions at all I will try to snap some pics tonight. I really don't want to lose this chick unless this is something incurable or that she could become a carrier of. She's incredibly sweet and vocal. When she was lethargic on Friday she didn't make a sound and I thought we were going to lose her. Since Saturday she talks to me a lot and greets me when I walk into our bathroom where her crate is. I would like to have her out more but our cats make that impossible. Any help is appreciated. Thank you guys. I hope it's good news.