Ruben prances across the street one recent morning on his way to work on a corner of Tijuana's famous tourist strip, Avenida Revolución.
Ruben's hair is freshly dyed. His nametag is shiny.
But both he and his boss, Victor Reyes, have long faces.
Ruben, well, he's a donkey, (a "zonkey" in local parlance).
As for Reyes, his business — taking photos of tourists atop Ruben — has stumbled on hard times.