By spending a year alongside rising star Jack, a champion Australian shepherd, and his canine and human friends, magazine journalist Josh Dean yanks back the curtain on the dog show world, providing not just a hilarious and often touching portrait of a colorful subculture only slightly exaggerated in the film "Best in Show," but also a revealing look at our love affair with the world's most doted-upon and tinkered-with animal species, examining the colossal array of dog types and humans who love them.