Mrs. Frisby and the Rats of NIMH

Mrs. Frisby and the Rats of NIMHis a 1977 Disney animated film. Based on the book by Robert C. O'Brien. It was dropped when Woolie Reitherman claimed that they had already made a mouse picture which was The Rescuers. That was before Don Bluth and his fellow animators left to pursue the project during production on The Fox and the Hound. And also, it was reincarnated into The Secret of NIMH by MGM, often considered one of Bluth's greatest films.