I noticed one of my Red Star hens has been sleeping in the corner of the coop, next to their water can, all day for the past 3 or 4 days. Her manure is clear, kind of like an egg white. It looks like she's losing a few more feathers than usual. She hasn't laid any eggs. I put antibiotics in the water to hopefully keep the rest of the flock healthy, and brought the sick one inside, and put her in a dog crate. I'm putting antibiotics in her water and keeping her warm while she sleeps. Is there anything else I can do? Do you know what's wrong with her? I've never had a chicken sick before (lucky me) and I'm not sure what else to do, PLEASE HELP! She's move of a pet than just a chicken to provide eggs, I don't want to lose her!