I moved a watering tub in the coop today and found tons of maggots under it, the chickens had obviously been pecking around the tub so there must have been more around it. there was only broken down stall pellets around and under the dish, no thing they could 'feed' on. The chickens went nuts on them after i moved the dish but I am worried about them eating them. I also have ducks in the pen. are maggots safe for them to eat? should i worry? any chance of illness from them eating them?? i don't understand why they were there, I have never seen any before or any signs of them before, not even under the big watering tub. could the pellets be the cause??