In this episode, Vero and Heidi review some of the teenager behaviours your puppy may develop as they get older. Vero relates some of these to her dog Ralph who is now 9 months. Heidi then reviews two articles she discovered in Times magazine: a study that measured oxytocin levels of owners and their pets after petting, talking and gazing at their dog and the brain activity of a dog when experimenting with scents and treats.