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. Female reindeer retain their antlers
till after they give birth in the spring.
Therefore, according to EVERY 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.