Pasty chick update: the little cuckoo marans with the terribly pasty tush seems to be past the worst. I'm so grateful for all of your help. She hasn't pasted in 3 days or so. The warm baths cleaned her up and between the cider and yogurt her gut seems to be passing things much better. The a&d worked wonders. Plus she falls asleep in my hands and coos now. She seems to know I tried so hard to save her. My husband named her Miranda the marans. Funny. Hopefully she's past the worst. Thank you everyone for your advice!!