ORIGINAL: ostdc
First, I think you have heard this before, if you want him to stay, shoot his momma. I believe it is the doe that forces the 1 1/2 y.o. bucks to disperse, right?
Second, it is generally the doe family groups that dominate the best nutritional areas and leave the bucks or bachelor groups with the less than adequate areas. So even your bucks with all your hard work may not be getting as much of the good stuff as they should.
True the doe runs the son off so he will not establish territory near her and possibly breed her sooner or later.
Second: no family groups don't dominate the best areas. Only to the extent that larger bucks sequester themselves away in hidey holes. But when push comes to shove and the bucks need to put on weight for the winter, they horn does out and take the best areas.