A television series that made its debut last night on CBS employs a familiar reality-television formula: Contestants are evaluated by a panel of sharp-tongued judges, tasked with eliminating a participant at the end of each episode. The difference here is that the entrants are not aspiring supermodels, fashion designers, captains of industry, or celebrity hair stylists; they’re dogs — and not just any dogs, but ones who can, according to their bios, surf, skateboard, spell, sneeze on cue, and set a table.