Hachiko...
Have a Kleenex box by your side when you watch the movie. Just as sad as Old Yeller and Where the Red Fern Grows.
I took my young grandkids to see “A Dog’s Purpose”. I cried so much my grandson was embarrassed, and my little granddaughter was consoling me and telling me it was just a movie. They told their mom about it and I was a laughingstock.