Dog was a really cute movie but more then that I feel like it was a really balanced movie. And by that I mean it wasn’t all sad or all happy. For every moment you laughed, you cried and vice versa.
That’s what made Dog unique for a dog movie. Normally you go into a movie about a dog expecting it to be all funny or ultimately sad by the end, but Dog wasn’t like that. My emotions went up and down during the entirety of the the movie which ultimately left me at a content emotional middle ground slightly leaning towards happy. If you know what I mean. Which is pretty good by my standards, but only if it’s for a movie about a dog. Ultimately if I was left feeling how I did after watching Dog for any other type of movie I wouldn’t have been impressed.
I also feel compelled to add that according to my dad the details they had about the Rangers were pretty accurate and as anyone can agree accuracy in a realistic movie is very important. So, all in all I would give Dog a 6 out of 10. An excellent dog movie but an average movie in general.
Nerd Thoughts 
I really enjoyed reading your review and agree with you that feeling alternately happy and sad while watching a movie is satisfying – it’s nice when you get to know the characters and see the complexity behind their lives.