Three things are necessary for deer to attain large bodies and racks: genetics, age, and nutrition. Your are probably stuck with the genetics you have. Allowing the young bucks to live to the 5 1/2 or so age to get their maximum growth and antler deveopment is something that you and your neighbors can do something about. In most places the majority of the bucks harvested are 1 1/2 or 2 1/2 year old. Trying to properly manage your deer herd is worth it. Supplementing deer feed with summer crops of soybeand, iron clay peas, Tecomate Lablab or similar crops will pay off, but it is not going to be a one year deal. Actual results will probably not be noticed for a few years and will be a result mainly of the time factor. All big bucks were once little bucks.