The world’s smallest antelope (not a deer) is the dik-dik. They typically stand about 12″ to 16″ tall at the shoulder. According to Wikipedia, the name comes from “the alarm calls of the females.”

Via leftatabq.tumblr.com

They tend to be a bit on the goofy side (h/t Susan):

Via Susan K. Morrow on Facebook

But don’t ever get on their bad side:

Via animalcapshunz.com