Round one begins with intelligence as Chris and Liz find out whether either species can understand numbers. Round two tests their sensory powers to work out which animal has the better vision, sense of smell and hearing. Together, they put our favourite pets under the microscope to see what really makes them tick and crucially, how they compare with each other.
Chris Packham and Liz Bonnin battle it out over five more rounds as they put our favourite pets through their paces, beginning with which animal is easier to train. Round two looks at communication. In round three, Liz finds out which is better at reducing our stress. Round four is about independence. The final round looks at the big question: do our cats and dogs really love us? Chris and Liz sum up their findings, but who will come out on top, the cats or the dogs?