This is My Friend The Dog by Albert Payson Terhune a Vintage 1926 Hardcover Book 

In My Friend the Dog by Albert Payson Terhune, a young boy befriends a stray dog. The dog is lovingly adopted and is given the name "Bruce." The boy and Bruce have many adventures together, including camping trips and hunting, and Bruce even saves the boy from a dangerous bear. Although Bruce eventually passes away, the boy never forgets his loyal and brave friend. This heartwarming story shows the strong bond between a boy and his beloved pet.