This is a silent film, though I assume that in it's original form there was a soundtrack and/or sound effects, as silent films were definitely things of the past by 1940. This combined with the fact that a previous stop-motion short covered much of the same territory (and did it better) make this one you can skip.
The film consists of the daily routine of the same mice from WILD OYSTERS, but this time there is no cat and the mice only torture the dog a bit. I really wish they'd done more of this sadistic "Itchy and Scratchy" type humor, as it was funny. Sadly, most of the film is spent watching the mice do very dull things--going to bed, cleaning up, etc.. While you appreciate the care that Charley Bowers put into making this film, you can't help but think that he'd seen better days. As for me, I much prefer his earlier films where he was the star. The stop-motion only films just don't have the belly-laughs of the other films.