Mortality Quotes in A Dog's Purpose

How we cite our quotes: (Chapter.Paragraph)

Quote #10

There was no pain, no fear, nothing but the sense that my brave boy was going where he was supposed to go. (32.45)

The dog is confident that Ethan is going where he is "supposed to go," but he doesn't say exactly where that is. Does the dog believe that Ethan will move on to an afterlife? Why doesn't he think that Ethan will be reincarnated as the dog himself was? Or does he maybe believe that?