-Love the color and music.
-Shot selection is somewhat repetitive, gives the feeling of covering the same ground multiple times, instead of a long journey. How about a very wide shot with a tiny dog traversing the mountain? Or the dog in a different sort of locale (e.g. passing through a town) to show the length of his travels?
-Focus misses the mark in the shot at 0:36, and seems like you're chasing focus in the following shot.
-Cinematography feels a little like "guy with camera chasing dog," as opposed to smoothly executed shots that make the cameraman disappear.
-On the closing shot, horizon is tilted. Trees lean left.