Facial expressions:
the happy smile - trotting thru the house with their mouths open, lips pulled back
the you hurt my feelings look - looking up at you after you've gotten after them with their bottom lip stuck out and a frown on their faces
the big grin - gee I'm happy to see you; it's been so long. Full frontal teeth showing and an obvious grin
sad & heartbroken (the long face) - gosh I can't believe you are leaving me here all alone
total excitement - big bright eyes, ears going in every direction, and mouth in a big O
Yorkies are the most expressive I've ever seen.
