My chickens are having a rough time in Texas right now. It is over 101. I am providing water, fans, ice, watermelon and electrolytes. But now one of my chickens has a discolored stain on the front of her, like she has been drooling down the front. She picks at it and so does my other chicken. Is this normal. I can find nothing about this discoloration. She is eating, laying eggs and squawking up a storm. Has this happened to anyone else? Thanks.