Alaska
Department of Fish and Game.
According to
the Alaska Department of Fish and Game, while both male and female reindeer
grow antlers in the summer each year, male reindeer drop their antlers at
the beginning of winter, usually late November to mid-December.
However female reindeer retain their antlers till after they give birth in
the spring.
Therefore, according to ever historical rendition depicting Santa's reindeer, every single one of them, from Rudolph to Blitzen, had to be a girl.
We
should've known. Only women would be able to drag a fat-ass man in a red
velvet suit all around the world in one night and not get lost.