This is what you usually say: "Beautiful" and really mean it. Yes, this movie is poetically beautiful. Focused on a little lonely girl with big heart. It's so peaceful from beginning to the end. Lou was such a beautiful dog, a mixed blood, not so pure to some pedigree means everything dog lover. But it's almost like a angelic dog species, you will not believe how this cute little dog acting like the most attractive animal in the world.
The reason that I didn't give this movie a 9 or 10 higher score is because there's some flaws in the editing. The time sequences were a bit messy, it jumped around and patched up randomly, sometimes you just couldn't understand what happened. Then somewhere along, it suddenly seemed to become a bit overly mysterious, involving after-life, eternity and incarnation. Maybe just because this story was too simple, so the screenplay writer and the director decided to twist the scenarios a little bit. But that actually ruined the simplicity of this simple movie.