You could try scanning through the Filmography pages and see if that helps you recall any examples, MJ.
I did that a couple of times, Rob, and I just could not recall a specific scene in those shorts right around the beginning of 1953. The short released just before his stroke was
Cuckoo On A Choo Choo, which was 12/4/1952. I do not know when the filming date of this picture was, but I believe Shemp was not showing any signs of having had a stroke. He is prominent in the film and has many speaking parts and is involved with many gags.
The first short released after Shemp's stroke was
Up In Daisy's Penthouse, and I cannot remember anything specific in that short, but I do not have access to my collection, as I stated before. The next three films (
Booty and the Beast, Tricky Dicks, and Loose Loot) use stock footage from one particular short,
Hold That Lion. I think this time period beginning February 1953 shows us the beginning of the decline in the shorts. This may have been because of Shemp's bad health. Perhaps Larry and Moe or even writers suggested that Shemp take it easy? Perhaps Columbia decided to really scale back production in January of 1953?
It really is too bad that I cannot use a specific scene of a short to give an example of, but by my going to the Filmography, I did realize that SOMETHING had taken place between December, 1952 and February 1953 that caused Columbia to begin to use stock footage in the Shemp shorts and continued on after that.