So today when I went to the porch (which is where we are currently keeping the chickens, we've had them when they were babies for about 1 month 1/2 now) I noticed one of them was just tired looking. So I picked her up and noticed around her mouth she has this gooey yellow/white gunk. I thought maybe it was the oatmeal we were feeding her, but it wasn't cooked oatmeal and that's never happened before. So I cleaned it off and she seems to be doing a little better. When I opened her beak a little bit I noticed it on the top of the roof, it was mostly almost like building up on the bottom beak. On top of that she just seems tired and worn out. I thought maybe this could be caused due to over heating and dehydration? The porch is a little stuffy and hot, actually today is the hottest it's been all summer so I thought maybe she is dehydrated. I would love some input, thank you!