The Puppy's Great Adventure (1979)

Animated. A puppy named Petey is left behind when his young owner, Tommy, gets adopted by a family that dislikes dogs. Determined to reunite with Tommy, Petey embarks on a journey to find him. Along the way, he encounters various characters and learns that two crooks plan to steal a valuable diamond from Tommy's new father. Petey, with the help of new friends, ultimately thwarts the robbery, proving his loyalty and earning a place in Tommy's new family. Keywords puppy, adventure, adoption, loyalty, diamond, robbery, family, friendship, determination