I have a 9 month old brown leghorn hen. The past two or three days she has not been well. She is all hunched up like she's trying to stay warm, and not moving around much. She is worse today than yesterday. She did drink some water this morning but didn't eat. There are no unusual poops in the coop. She started laying eggs again the other day (after some time off). Each day they are getting smaller (1.7oz down to 1.5oz). A few weeks ago her comb drooped over and has stayed that way. She had a slight case of frostbite on her comb about a month ago. This morning I put her in a crate with a heat lamp on dry hay with some food and water and tried to give her some yogurt which she would usually love but didn't touch. Any thoughts? I have a vet available and can get some medicine if needed. Thanks.