"According to the Alaska Department of Fish and Game, while both male and female reindeer grow antlers in the summer each year (the only members of the deer family, Cervidae, to have females do so), male reindeer drop their antlers at the beginning of winter, usually late November to mid December. Female reindeer retain their antlers till after they give birth in the spring."
You have amazing talent and I love seeing what you do next! This is marvelous! I'm going to sound like an animal nerd but I think it's really appropriate that this is a reindeer princess and not a prince. Male reindeer shed their antlers in the winter, while females shed them in the spring. It follows that, biologically speaking, Santa's reindeer should all be females. Buuuut, there's always the magic aspect to deal with. Magic doesn't really follow rules and, clearly, Santa's reindeer are magic...since they can fly. Anyway, I just thought I would share that. I found it interesting when my mammalogy professor told us that antler tid bit. Great art, though! I love it!