I have seen isolated bits of black, pudding-like poo in the past, but lately there's a lot more -- as if more chickens are doing it. The chickens are laying fine (the 5 that are old enough) and act normally. I feed them 3 c. of DuMor 20% feed daily, and they get a lot of grass and veggies. The seven girls go through about 1.5 gallons of water/day. I add dewormer from The Holistic Horse to their feed. What's going on? I didn't see anything quite like this on the sites I visited.