According to an article that was published by the Alaska Department of Fish and Game, it seems that both male and female reindeer antlers grow 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 EVERY historical rendition depicting Santa’s reindeer, EVERY single one of them, from Rudolph to Blitzen, had to be a girl.
We should have known……
ONLY women would be able to drag a fat-ass man in a red velvet suit all around the world in a single night and not get lost!
Image used under a Collective Commons License from https://www.flickr.com/photos/ekilby/8736486429