Dog's purpose (Juvenile)

When Bailey meets eight-year-old Ethan, he quickly figures out his purpose: to play with the boy, to explore the Farm during summers with the boy, and to tidy the boy's dishes by licking them clean (only when Mom isn't watching). But Bailey soon learns that life isn't always so simple--that sometimes bad things happen--and that there can be no greater purpose than to protect the boy he loves.

As soon as he sets eyes on CJ, Max knows that she's his girl and quickly figures out his purpose: to show her how to navigate the big city. Being a native New Yorker, Max knows how to take charge, even though he's the smallest dog at the park. At the same time, with CJ's help, Max learns that he doesn't always have to be ferocious-sometimes, he can be "gentle Max" and make friends. -- from Amazon.

Toby, an unusually calm beagle puppy, finds his purpose when Mona and her mother adopt him and teach him to be a therapy dog at a nursing home.

"Even though Bella has to hide from the neighbors and learn boring games like No Barks and Go Home, she loves her boy Lucas. Then one day Bella is picked up by Animal Control and Lucas is forced to send her to a foster home far away. Bella waits and waits for Lucas to come and get her, but days go by and he does not come. Finally Bella realizes what she needs to do--she needs to Go Home to Lucas--and even four hundred miles of dangerous Colorado wilderness...

When an accident leaves young pup Lacey's hind legs paralyzed, she must learn how to walk and play again, and when a tornado strikes, putting her human girl Wenling's and her best dog friend Cooper's families in danger, only Lacey and her cart can save the day.