50s-60? - Cats as cast... end of show, cats take off for moon...except 1 sad cat

Dont really know the year, but I would guess late 50s? Any rate, at the end of the show, all the cats board a rocket bound for the moon, except one sad cat. He is sad he cannot go with the others and siting down sulking and playing solitaire. I think there was a song to go along at the end and they were singing "everyone's gone to the moon". I want to say I watched this in the early 70s, but was a much older cartoon.

This was not the Cattanooga Cats, nor TopCat. Come to think of it, it could have been before the 50s.....but I don't know much cartoon history. Wish I could tell you more about the film quality or something like that, but its been years since I have seen it.

It's a real stretch, but I cannot get it out of my mind. I have a cat at home here that just reminds me of the sad cat at the end of this cartoon. His crying and wining always reminds me of it. Hehehe.

Glad I cam across this site....probably no better place to post my question.

Thank you,
Vince