People love their pets almost as much as (and sometimes more than) they love their children. But there are only a few places where people can have the viral fun of, say, an "Elf Yourself," that's geared specifically for the four-legged members of the family. Enter "Beggin' Time," a new viral campaign for Purina from Oddcast, in which people can put photos of themselves and their pets dancing to a revamped version of "U Can't Touch This"...