I am a new chicken owner, we were "city slickers" that bought a tree/vegetable/egg farm turn-key and have been in the house for a week. We noticed one of our Rhodies laying around the run, not leaving it to explore and forage, and normally the chickens are still pretty skittish of us, but she let me walk right up to her to check her out. She doesn't have any mucous/foam around the mouth or eyes, though she does have very poopy, matted tail feathers-no blood, but watery dark green with urates. She was drinking water, but had no interest in feed. I did switch their feed last week from the Purina Layena to an organic corn/soy free Magill Farms feed (that they went wild over). It was wet and cold last night, after being unseasonably warm the prior 3 days. (PACNW) I isolated her and put her in the workshop (no fumes) on a bed of hay and under a heating lamp with water and fresh/raw cream soaked feed. She promptly fell asleep (she is still breathing, I can see her "rise and fall") Wondering if anyone has any ideas on what the issue might be, and any other advice to give. Thank you!