He's been acting weird for a few weeks, chewing on everything possible and drooling a lot. His new favorite chew toy foam mat on the living room floor, especially the edge pieces.
Then New Year's Eve, he had the worst night of his life (I know it sounds like an exaggeration, but because he life has been relatively short, it's actually accurate). He was up every few minutes all night, wouldn't nurse, and wouldn't be comforted.
We finally felt the tooth coming in, and the other day it finally poked through.
Of course it's not one of the central incisors (front teeth), like most normal babies. It's probably a lateral incisor (the next ones over) or even a Canine (the pointy ones), so he's going to look so goofy!