This is Roxy, the 9 year old female Boxer and American Staffordshire Terrier mixed breed from Los Angeles, CA. Roxy actually smiles when she's excited or embarrassed. It looks very similar to upside down. She was 3 when I got her… not socialized. Once I was cleaning a closet in the hall.. the door was open, blocking me… and she began to growl at it. At me!! Nervously… I peeked my head around to look at her… when she realized it was me… she wagged her entire butt… and smiled really big shaking her head… like she was all embarrassed. Photo sent by Cynthia.