I have a white leghorn that is very unhappy about our freezing cold weather and all of the snow on the ground. She hasn't come out of the the coop in a few days, and I'm not sure if she's eating or drinking. This morning I noticed that she has a thick, yellowish discharge (sorry, I really hate that word!) coming from her rear end. She's breathing a little heavy. Anyone know what this could be or what I should do? Someone suggested it could an egg yolk, but I don't think that's it. Any info would be much appreciated.