Hi, I have a Rhode Island Red hen, Martha, approx. 1 year old, who is sick and I don't know why. I have been on vacation until last night. When I got home I checked on my girls and noticed that Martha's comb was limp. Today she is just standing around, not quite lethargic, but definitely slow moving. Her chest looks swollen. My first thought was impacted crop. Her crop is not impacted. It is soft and mushy. The "swollen chest" seems to be pushing her head to the side slightly. I have examined her and nothing seems swollen. It is all feathers. I don't think that she is dehydrated or over heated. I have her in the house and have observed her drinking water. I have not seen her eat food, but she did eat a few mealworms. We have experienced mild temperatures during the past week. The coop is in the shade and Martha has had continuous access to food and water. Occasionally she will pant. It lasts one or two pants and is very random. Martha is not talking. Typically she is quite fond of telling you what is on her mind. She will squawk when I pick her up. She lost quite a few feathers while I was handling her today. This is not normal. She has always allowed me to pick her up without feather loss. I don't think that it is Marerk's disease. She is able to run away when she wants. I have had another chicken with this disease and Martha is in no way acting like the other chicken. Her eyes seem bright, pupils look normal. She has laid an egg for the last 5 days. No egg today. She has not pooped since being in the house. My other 4 chicks seem to be fine. Anyone have any idea of what is going on? I am at a complete loss.