Hi all. I have a galvanized waterer for my chickens, about 3 gallons I think. It has an internal water container with an outer shell that slides over and triggers the flow mechanism. I currently have it sitting on cinder blocks up off the ground. I have been noticing that at times, the tray seems to have very little water in it, and the chickens have trouble getting a drink from the shallow bit left in the tray. I then go in to the run and pull up on the handle, and can hear the vacuum seal break, and water flows out and fills the tray. I have found myself having to do this once a day. Why does the vacuum seal keep stopping the water flow? Would this change if I hung the waterer? I considered drilling a small hole in it, but was afraid that would cause all of the water to spill out at once. I have also been considering the winter watering issue before I modify anything. It gets extremely cold here, and I probably won't want the trays to have super deep water in them at that time, as it will lead to wet waddles. Has anybody else encountered/fixed this problem?