Male reindeer shed their antlers during winter. Females don’t. Santa’s reindeer are all female.
Dasher and Dancer and Prancer and Vixen, Comet and Cupid and Donner and Blitzen. Rudolph makes nine, 3X3, three and nine being numbers sacred to the Goddess.
“Of course Santa’s reindeer are female. Only women could drag a fat man in a velvet suit around the world in one night.”
But I’ll get serious now and suggest you read this article, or reread it, for Yule.