Please, don't tell her to say cheese.
Everybody loves being told to smile! That's why men on the street tell women they don't know to do it. In this video, Josh Gottsegen show us this universal truth as it applies to dogs.
JK, men who do that are horrible and this dog looks effing miserable. It's especially sad because dogs usually seem so pleased with themselves when they successfully complete a trick and are rewarded with praise/treats. Mostly treats. Having to pretend you're happy when you're not must poison the whole thing.
Or maybe Gottsegen just hasn't been able to train an animal who can SMILE with their EYES, aka SMIZE. Get Tyra in here: