all jokes aside,genetics,food source,mineral,and they say stress plays an important role in antler growth-not necassarily in that order.like anything else though,they're can be what we call late bloomers though so unless your in a controlled environment i wouldn,t be too concerned on culling.improving the health of your deer herd by feeding,using suppliments and mineral licks can improve the general health and potential of your herd.is the expense worth the rewards,can your property withstand the effects of a un-naturally supplimented deer herd.brouse make up a lot more of a whitetails diet than what most people realize.it usually takes years of serious investment of not only money but also time to alter your herd,and unless your dealing with penned animals,almost impossible to have that much control over free roaming deer.you'll notice deer yard up in the late winter and the bucks usually group up by age class also,that being said consider this,do they normally winter on your property?if so,then you can have somewhat of an impact on them but if not,who's going to reap the benefits of your money and labor.i plant feed plots to try to hold the deer in the core of our property ,not to hunt because if your pressureing these animals away from your feed plots what benefit are they to your deer,i'm trying to protect what i can from the road hunters that have invaded us since the harvest of the amish buck last year.the deer lick the blocks i keep out for the cattle so i'm not doing anything special in that case the plots are specifically for the deer and turkey though.this is my opinion only based on years of raising livestock.