Does your dog smile at you?

Yes, my dogs would smile at us, especially our beagle. But even more than just smiling we could usually tell if they were happy by the inflection in their barking and howling. They would always put on the cheese grin when they thought they could score some table food from us.

My coonhound though also had another habit where it might look like she was smiling, but she was actually threatening to bite you. She would start "flashing her teeth" and sticking her tongue out if you were irritating her in some way. Usually we got this attitude from her if we tried to kick her off of our bed.