Notes on the movie
Once Upon A Forest opened to mixed reviews on June 18, 1993 and was not the financial success that the filmmakers had hoped for – of course, there was the small matter of Spielberg’s dinosaurs crowding the marketplace back then. None of this, however, kept Forest from being nominated for an Annie Award for Best Animated Feature in 1993 and winning an MPSE Golden Reel Award for Best Sound Editing.
A quick internet search does not reveal very much about the production, but there is an informative Wikipedia page. It has this to say about the production.
Once Upon