In this episode of Talk Nerdy, Cara is joined by Dr. Alexandra Horowitz, professor and head of the Dog Cognition Lab at Barnard College, Columbia University. They talk about her newest book, "The Year of the Puppy: How Dogs Become Themselves." Also discussed is the special relationship we have with our dogs and the developmental stages they experience, from puppy to older adult. Follow Alexandra: @DogUmwelt.