The Chihuahua (well, all three, including the two you can sort of half see) are from the vicious Chihuahua gang. I have no idea who the boy is, but I have to admit, the whole tableau is quite adorable.
Pictures are from the grand opening of the Rincon Hill Dog Park, directly out in front of le truc.
![OH MY GOD YAY CUDDLES OH MY GOD SO EXCITING! Chihuahua and Kid](https://dogsofsf.com/wp-content/uploads/2012/03/IMG_9898-533x800.jpg)
There seem to be two breeds of Chihuahua out there, really: the 'terrified' breed and the 'EXCITED!' breed. This guy is definitely the latter.