"So ends another busy day. Dopey and Gallant wish you a good night." (1937) A print from the book 'Dopey & Gallant .... A day in the life of two curious little dogs' by British author Marjorie Turner. Raphael Tuck & Sons Ltd Publishers.
I believe if you look closely there are puppies among the dots!
"Gallant and Dopey - Pages From a Dog's Scrapbook," by Marjorie Turner.