Lots of dogs look happy the majority of the time — have you ever seen a Frenchie frown? But a dog who actually smiles is a little more rare, not to mention a lot more exciting. Milo the Goldendoodle looks like a big sweetie anyway, but once he flashes those pearly whites for his mama (and then does it again and again), well, let's just see if you can keep from grinning right back.