Eastern South Dakota has great soil for growing crops, but some areas of western South Dakota come with marginal lands. These are not the best for farming but good for pastureland and areas for grazing and raising livestock using a method called farm flock operations. A farm flock is an intensive production system that requires more hands-on management. Sheep in this system are raised on fewer acres, they are on pasture during the summer and their feed is supplemented with grain and alfalfa as needed. Farm flocks give birth in a barn or lamb shed with some help from the farmer or rancher. Ewes with multiple lambs may not have enough milk to feed her young, so the lambs can either be bottle fed with milk replacer or “grafted” onto another ewe (or moving a lamb to another ewe so they adopt the lamb as their own).