Documentary about men who live as dogs

Secret Life of the Human Pups is a Channel 4 documentary that takes a "sympathetic look at the world of pup play, a movement that grew out of the BDSM community and has exploded in the last 15 years as the internet made it easier to reach out to likeminded people."

From The Guardian:

While the pup community is a broad church, human pups tend to be male, gay, have an interest in dressing in leather, wear dog-like hoods, enjoy tactile interactions like stomach rubbing or ear tickling, play with toys, eat out of bowls and are often in a relationship with their human "handlers".