Seton Doubutsuki: Risu no Banner
English title: Bannertail: The Story of Gray Squirrel
Japanese title: シートン動物記　りすのバナ
Type: TV
Source: Novel
Episodes: 26
Status: Finished Airing
Aired: Apr 7, 1979 to Sep 29, 1979
Broadcast: Unknown
Duration: 23 min per ep
Rating: G - All Ages
Studios: Nippon Animation
Genres: Drama
Demographics: Kids

Soon after birth a young squirrel comesc to a farm, and gets caught by a human. This human then tries to find him to their pet cat. However, the cat feels sorry for the squirrel and adopts him as their child and names the squirrel Banner. Banner and the cat live happily in the farm, but their happy lives don't last long. A fire destoys the farm, and Banner gets separated from his mother the cat. 

(Source: ANN)