I'm 50 years old and back in the 1960's, sometime when I was under 10, I saw a live action movie version on t.v. I could tell at the time it was an old movie, but it WAS in color, which means it probably came out no earlier than 1940's. In this movie, Puss was travelling with a rooster, both actors in suits and their mouths didn't move when they said their lines, there were musical numbers and it seemed to have a British cast. Does this sound familiar to anyone?
The version of "The Musicians of Bremen" you're thinking of. Would that be the musical made for t.v. version by Jim Hensen, not with his known muppets(Kermit,Miss Piggy, etc.), but an all muppet cast, in which Carol Channing was the voice of the trumpet playing cat, musical number:"I think you mice are kinda nice.", and each of the animals' respective owners who cast them out are in cahoots over some stolen loot. But when the four animals...an ass, a rooster, a hound dog(who loved ham), and Carol Channing's cat are watching the silouettes of their former owners divying up the loot through a drawn window shade...they think they're seeing a family sitting down to dinner who they think might take them all in. Musical number:"A father, a mother, a sister, a brother". Would that be the one? It was telecast some time in the mid seventies and it was hilarious!
Great minds run in the same channel, and fools think alike.