Hey, I have four hens....17ish weeks old. One started laying last weekend. It has been very warm the past couple days. I got home today and it was 91 degrees with a heat index of 101. I noticed one of my hens (the one who started layihng) was not keeping up with the flock and acting very lethargic. The three are off in the pine trees and she is under the stairs of my deck. I've tried giving them cold water melon, and the three eat it, but the lethargic hen is not. she's eating a little ebit of grass but that seems to be it. Tried ice cubes, and I keep their water cold and fresh. I haven't seen her drink. What can I do?