I have a flock of Australorps about 8 months old and one of the pullets has dried up white poop covering alot of her butt feathers.. The others don't have this issue, she eats/drinks fine, alert, and so signs of her being sick. I feed my pullets only layer pellets sometimes corn. Dose she have diarrhea? If so how can I treat it? Also a bit later on I am going to check her poop when she's on the roost and check to see any worms from her droppings.