Ringing Bell
In this anime classic, a curious young lamb's life is changed forever, after his mother is killed by a wolf, while she attempts to save his life.
Starring Akira Kamiya, Minori Matsushima, Seizô Katô, Hitoshi Takagi, Taeko Nakanishi
Watch "Ringing Bell" from streaming services Tubi TV, Crunchy Roll, Roku Channel and several more released in 1978. It's a animation and drama movie, and has a rating of 7.2 out of 10 from Imdb which is usually fine for this kind of movie, and is currently available to watch for free.
Watch it here
Tubi TV