I have a hen that won't come out of her box, she's not laying so I've been.making her come out to eat and drink, she's normally pretty active, today I noticed when I went to move her I heard a squirting sound, and an awful smell! I mean it's so bad I almost puked !!! And it was a grayish runny color....I'm assuming her poop, and my other 3 hens dont Want to go in the coop...any ideas?