I purchased one of these: http://www.flemingoutdoors.com/CATALOG/3_gallon_double_wall_fount_4987158.htm Does anybody else use one? Seems simple enough... slip the top off, fill it with water, slip the top back on and lock it into place. I have it hanging next to my hanging feeder inside the henhouse. The problem is, often (and for no reason I can determine) the water in the drinking resevoir raises up right to the rim and starts dripping over the sides and all over the floor. At first I thought maybe the chicks were hitting it somehow and making it spill, but once it happened when I was working in the henhouse(the chicks were in the run) ... it had been fine for about 10 minutes, I heard the dripping sound and turned around to see it over flowing. So, is there some trick to this thing, or do I have a lemon?