The first set of quarter-finalists take on a traditional dog groom when they gently removing the dead hairs from the coat of one of the UK's oldest breeds, the Welsh terrier, before producing a very modern look for the Dogwalk that requires smiley faces, flared legs and little outfits. Plus, in a new challenge, the contestants' knowledge of crossbreeds is put to the test as they try to identify a dog's parents.