Ok, just got back from the barn. Her vent looks good- clean, normal. Her feathers below her vent are all separated from the diarrhea she has had, but they weren't dirty or cakes with fecal matter. No lice or mites- she is quite clean... but BOY does she smell like urine. That really full urine smell of a gas station bathroom, or a city alley on a hot July day.
I changed out her bedding (instead of straw I put white paper towel into the cat carrier- and she had 4-6 poops in there, no worms, but also nothing that would fill a teaspoon. all liquid marks with maybe a 1/2 teaspoon of solid looking stuff total.
Her breast bone shocked me- it looked just like the breast bone on a roast chicken carcass as you toss it in the pot for bone broth- protruding and no meat on either side of it! She must weigh less than 1.5 lbs. I picked up one of her sisters to compare the breast bone- the others look flat, and full- but hers is like a bare ridge all the way down.
How could she be laying up until 2 weeks ago? She is so thin. I don't know what to do.