Hoero! Bun Bun
Japanese title: ほえろブンブン
Alternative titles: Hoero BunBun, Bark! Bun Bun, Tchaou et Grodo
Type: TV
Source: Unknown
Episodes: 39
Status: Finished Airing
Aired: Oct 9, 1980 to Jul 9, 1981
Broadcast: Unknown
Duration: 23 min per ep
Rating: G - All Ages
Producers: TV Tokyo, Wako Productions
Genres: Adventure, Slice of Life

Bunbun, an abandoned puppy meets the old Big, also a stray dog. Bunbun will learn to survive in an hostile and strange world. 

(Source: manga-distribution.fr)