ORIGINAL: max the dog
That may be true but big mama's aren't scaring off the big bucks. They attract them. The little does aren't very good breeders like the big does are. I read somewhere a few years ago about a study where for every year a doe is old her fawn mortality drops in half. That means a 2 year old doe looses half the fawns that a 1 year old doe will and a 3 year old does looses even less.
I'm also reminded of a doe I've been seing for the past few years who's been bearing twins season after season. She's an old girl who knows how to keep her fawns alive. Bucks will walk right past her young doe fawns to breed her even if all of them are in season at the same time.
I don't think it matters what age they are if they are in heat a buck will try and bread them no matter if they are 2,3, or 4. I don't think older doe attract big bucks any more than younger doe they just have to be in heat. I would much rather see young doe and young bucks eating than some old doe running off my younger deer.