Obviously, a four yr old deer like that would be a freak in uncontolled, less managed land off your property. Do you attibute the quality of your deer primarily to 25 years of your continued efforts with nutrition?
Great question I am glad you asked. We do consistently grow 4 yr olds much bigger than the norm for our neighborhood and the state as well. In fact I propose the overall bell curve of our bucks is bigger than the norm both by weight in all age classes as well as antler size by all age class. The interesting question is why.
The short answer is management , including a healthy dose of long term nutrition, grows bucks like that. The conventional wisdom is age, nutrition and genetics. I suggest that it is nutrition, age, and time....as genetics can be shifted over time. Nutrition improves all age classes. I know some believe that the bucks we grow are a result of 2500 acres under game fence. I have learned from personal hands on experience simultaneously managing both fenced and unfenced properties that wire does not grow big deer. Management practices grow big deer. Granted , the more control one can have by whatever means increases the opportunity for improved outcomes.
Unquestionably nutrition has been a big part of our success. While most of our bucks were getting killed prematurely for all the years we were unfenced we were still getting the benefit of the maternal effect from nutrition. Once we fenced the property, we captured the generations of nutrition and the results speak for themselves. Also we had the discipline to let terrific bucks get age on them...some of the bucks were bigger than anything we had ever shot.It was hard to pass them up and crushing when we find some of them dead from fighting and other causes. We also balanced the herd, kept the population well below carrying capacity, and consistently removed some of the mature lessor quality bucks each year .
I don't believe you shift genetics thru harvest. Its not the bucks you remove that make a herd great. It is the ones you leave behind. Still taking out lessor quality bucks helps manage population and shift upward the quality of all remaining bucks. that also leaves the highest quality bucks in the herd a few more years for the breeding they do participate in. It all adds up.
The corollary question here is how does all this effect hunting. Unquestionably the hunting improves as the herd is so much better with more quality bucks and a more natural herd. However, hunting a specific buck is still just as hard as ever. The 'deerness' in them is just as strong as ever and to think they are less wild in any way is simply wrong. The mature bucks have been watching how we move for years and are quite savvy about hunting, hiding and never being seen. Does that get pressured every year become some of the smartest animals on the planet and would challenge the best of us. Of the properties I manage without question the hardest deer to hunt are the mature bucks here on the farm.