The Tibetan Dog

The Tibetan Dog is a 2011 Chinese/Japanese animated film directed by Masayuki Kojima, co-produced by Madhouse, China Film Group Corporation and Ciwen Pictures. It is based on the novel Mastiffs of the Plateau by Yang Zhijun. It premiered at the 51st Annecy Film Festival in June 2011. Manga artist Naoki Urasawa provided the initial character designs before they were reworked by Shigeru Fujita. In this film, a young boy named Tenzing leaves for Tibet after his mother dies to live with his father in the prairies and encounters a true friend in the form of a golden Tibetan Mastiff. Maiden Japan released the film on home video in the U.S.

Synopsis from Wikipedia, CC BY-SA 4.0. Everything below written here.

Poster © the film's rights holders.