4S 20% Premium Deer Pellets are a high protein deer feed that should be fed during antler growing months (Spring & Summer). Since bucks are beginning antler growth and body mass recovery and does are nearing the end of gestation, protein requirements are higher during this period. 4S 20% consist of high quality by-pass protein, non by-pass protein, vitamins and chelated minerals as well as elevated levels of fat/energy. We have had outstanding results with this ration. We have received waves of testimonials from our customers confirming increased antler and body size. This is not just a maintenance feed; it has been carefully formulated and designed to give deer what they need to push them to reach their full potential.