Hi, I am very concerned about one of my RIR's she's been very sluggish lately and hasn't done a lot of moving around with the other chickens. She has poopy butt and her poo is very watery. I don't know what to do I've tried giving the whole flock yogurt for the probiotics because I'm concerned if this is contagious or not. I've also added sugar to their water for electrolytes. Does any have an idea what wrong with her? Should I separate her? I have 6 grown up hens and 10, 8 week old chicks living together. I am very concerned about the chicks if this is contagious.