Especially when they get almost two gallons of milk every day.
It's hard to know exactly how to formulate his diet. You can't just feed a pig corn and expect him to grow well; they need a certain amount of protein to make the corn do what it needs to do. I know Stanley gets lots of protein from all the milk he drinks, but is it enough? I still give him some supplemental protein once in awhile. I must be doing something right, from the looks of him.
Protein is pretty pricey. Corn, right now, is fairly cheap, all things considered. So the less protein I have to buy for him, the better. I suppose I had better keep on milking that cow!