I have three show chickens and they always have runny poop sometimes it's so bad it shots like 6 inches out. I worm them every month, they have no mites, and lay regular. But after I feed them scratch they seem to sneeze a lot like water comes out of their noses. They hardly poop solid and it's a gray color and the runny poop is a brown color or also when it shots of it is clear with little chunks of food. What could be happening? They run around and seem fine.