The Littlest Puppy Grows Up: Follows the journey of a tiny puppy named Terry, raised by Don and Doug Dow alongside her mother, Mack. Initially struggling to nurse due to Mack's illness, Terry learns to drink from a bottle and eventually transitions to eating solid food. The boys are taught how to handle her gently and are patient as she learns to walk and explore. They also learn the importance of proper care, including hygiene and regular vet visits. As Terry grows, she becomes more active and playful, developing good manners and a strong bond with her family.