This week, New York City hosts the Westminster Kennel Club Dog Show, a showcase for best of the best of each breed of dog. But how breeders create those perfect dogs is the subject of much debate and a new documentary by our partners at the BBC is adding flames to the fire. In fact, their research was so provocative that it prompted big changes at the British Kennel Club. Producer Jemima Harrison joins us to explain why what makes for best in show could be the worst for dogs.