i see ppl saying kill them which is fine. but also concider the does have the gene also. and more than likly there are bucks with the gene that doesnt show in the rack because they have it as a recessive gene rather than a dominant gene.
senerio.. you kill all "cull" bucks. then in 3 yrs the same rack formation shows up. because a buck with the gene is still alive you just do not know which buck it is and he bred a doe with the gene and their offspring came out with it as a dominant gene which causes the rack to form in that manor.
it might take you 10 yrs to completly rid that gene if you can succeed at all. then there is always the possibility that it will show back up at some point.