A few nice dog smile images I found:
Playful expression of Miruku
Image by Takashi(aes256)
Miruku really loves to play with a person. So playing with her always makes her smile like this
Canon EOS 7D + Sigma 30mm F1.4 EX DC HSM
Wanna Be Friends?
Image by cindy47452
"Do ya wanna?? huh?? huh?? I give smiles and kisses for free!!!!"
Met this cutie in Madison, Indiana the other day. Such a sweetie!