There was an anime show made in 2005 like Avatar: The Last AirBender. But it's called Ginga Densetsu Weed, it's about Japanese wild dogs, and it only had 26 episodes. It can be seen on YouTube.
Like Aang, Weed (Akita Inu/Kishu Inu) is a peacemaker and hates to kill. UNLIKE Aang, Weed WILL fight back if he needs to.