For my two I have cut a 50 gallon barrel in half, then trimmed each half down a bit all the way around. They are about 20 inches tall at the tallest part. Then I cut a big section out (wide enough for an adult to get their head in) out of one side each, down to about 4 or 5 inches above ground. I set these back to back and have poles driven through each feeder deep into the ground. They can move them around a little, lift them up a bit, but they do not move from where they are staked. I will get a picture up later. For milk or other liquid extras I generally make a moist mash with some regular feed ration. I do it that way because my feeders are drilled to drain rain water, so making slop decreases run off waste.