Antlers aren't made of a keratin sheath like bovine horns are, so they don't have nerve cells in them. they're a honeycombed structure of bone which disintegrates once the testosterone level drops low enough, which is why bucks shed their antlers after mating every year
If anyone is wondering what the prolife zootopia comic guy from back in the day is doing he just posted a comic where judy hopps is jfk