If your buck to doe numbers are close, you might be suprised to find out that the answer is not that many, when your buck and doe ratios are close the mature dominate bucks do most of the breeding...running off the younger bucks, but In the same instance I have seen 4.5 year old slick eights change drastically in just one more year, at age five that deer might develop stickers, or drops, sometimes it's a hard judgement to make..