As I understand it, a buck's potential is greatly dictated by the mother's health in early stages of pregnancy. Given that a pregnant doe will absolutely destroy mineral licks in very early spring, it's hard not to think you're positively influencing future rack size. She's obviously taking in a lot of nutrition that she isn't getting naturally, or at the very least a surplus of nutrition beyond natural. So while you might not necessarily be helping a buck grow bigger antlers, you just might be helping a doe have healthier fawns, which pays dividends for future bucks.
