The Last Mouse of Hamelin (1955)

The Pied Piper has led all of the mice in Hamelin into the sea with the exception of one because he was tonedeaf The cats are all competing with each other for the single surviving mouse aka the Last of the Mice He outwits them all woos and wins a cute girlmouse from the next village sets up housekeeping and starts a new line of Hamelin mice