A friend gave me two new hens. One stayed in the coop and lay down a lot, didn't seem to eat much (I never saw her with a normally bulging crop). I saw yellow diarrhea once, other times normal looking but rather soft poop, but she seemed to strain to poop. Lots of messy white stuff on the feathers around her vent. Then one morning she was unconscious and died while I held her. Her vent was pink and a little swollen looking. Otherwise she seemed "normal" except thin. Now two of my other hens have white stuff dripping from their vents, and somebody had mucousy diarrhea yesterday, so I'm very concerned that they've caught the disease and will waste away and die. I read about vent gleet, but I'm not sure that's the diagnosis here. Just white stuff on the first hen's butt; and the problem does seem to be contagious. There's no poultry vet in my area so I don't think I can get a poop sample analyzed unless I drive 80 miles or so...but I will do that if necessary. Any help with diagnosis and treatment would be great, TIA!