Thing ugly Christmas sweaters are just for humans? Think again. There are plenty of critters out there that have fantastically terrible sweaters of their own (and some with quite nice sweaters as well).
Of course, the biggest difference between humans and cats and dogs wearing ugly sweaters is that critters look absolutely adorable even in the world's ugliest sweater.
In fact, this Buzzfeed article with 26 pictures of animals in sweaters has inspired me to throw an ugly sweater party for dogs next year.