What Is Rachel Bilson Doing To That Dog? [PHOTOS]

Rachel Bilson was spotted out with her dog in Los Feliz today.  At one point, Bilson seemed to be riding the poor thing.  Why?  We have no idea.  ‘Cause it’s fun?

PHOTOS: Rachel Bilson Hits The Red Carpet

Bilson recently shot a few short films for Magnum Ice Cream with Chanel honcho Karl Lagerfeld, which will premiere at the Tribeca Film Festival.

Check out a clip of Lagerfeld’s masterpiece after the jump.