Male reindeer, known as bulls, shed their antlers in November, just before Christmas, and grow them back the following spring. The females (cows) keep their antlers through the winter and shed ...

However, the perennial bit of Christmas humor quoted above offers physiological evidence — specifically, the presence of antlers — demonstrating that Santa's reindeer are actually all female ...

Every year on Christmas ... implies the other reindeer are also male. But viral posts claim all of Santa’s reindeer are actually female because male reindeer lose their antlers in the winter.