Went to fill up the stock tank last night, there was a drowned hen in it. Of course it was a hen, not one of the extra roosters. And of course it was one of the younger ones, too. I have never figured out why the birdbrains want to drink out of the stock tank. We give them fresh water every single day, never let it run out. Their fount is in their coop, probably not 50 feet away from the stock tank. We have lost several hens this way over the years, more than predator losses. They really are birdbrains.