I think you would be better served to fertiliize the natural food sources if you want to improve your deer herd. Unless you have a large parcel of land and numerous trough feeders and plenty of money, the fertilizer on honeysuckle, briars and other browse will improve those plants that the deer actually prefer. The native vegetation also has as much or a lot more protein than the mixed supplements. One feeder with a few sacks of feed isn't going to do much good.