I'm well aware of why we need to feed protein.....be it tubs, cake/cubs, grain, silage, etc. All of these sources of protein have a certain percentage of moisture. Which hay, cubes, tubs are dry enough it's kinda pointless to figure. The point of my comment is you need to take the percentage of moisture out of a liquid feed to accurately know how much that protein is costing you vs. say alfalfa hay, soybean meal, cotton seed hulls, etc. Those ingredients might be higher priced to buy, but by the time you figure what the actual protein is costing you in something like liquid feed, distillers, silage, etc. the higher priced product might be the cheaper cost per pound of protein. With that said, my neighbor got liquid feed by the semi load. I'd buy off him. It definitely had it's place for certain things. I'm just saying know how much your actually paying for the protein.