Skimmilk is one of our most valuable protein feeds for hogs. We once thought it indispensable for successful hog raising. But now we have found out that we can get hogs to market without skimmilk in about as low a cost as with skimmilk. The value of skimmilk for hogs depends largely on three things: (1) Whether the hogs are fed on pasture, (2) how heavy they are and (3) the rate of feeding the skimmilk.