A Dogs Journey by Bruce Cameron, book to movie review

A Dog's Journey is the sequel of A Dog's Purpose by W. Bruce Cameron. The story starts with Buddy a good dog, an old dog from A Dog's Purpose. Buddy thought his purpose in life was completed by loving and caring for Ethan. Ethan was his human in A Dog's Purpose but he died. A year after A Dog's Purpose Hannah has allowed Gloria and her infant child Clarity June (CJ) to stay with her at the farm after the death of Ethan and Hannah's son, Henry. Gloria takes an immediate dislike to Hannah's old Labrador Retriever, Buddy, who feels he has found his purpose, which was to watch over CJ. Numerous incidents occur in which Gloria's negligence endangers Clarity June before Buddy saves her. Gloria blames Buddy for all of them. Hannah suggests that she keep CJ at the farm while Gloria pursues her singing career, enraging Gloria, who leaves with Clarity June. Hannah notices Buddy has a limp and takes him to the vet. A veterinarian diagnoses Buddy with cancer and he is euthanized shortly after.
Buddy wakes up reincarnated as many different dogs until he finds CJ.