Understandable how worried you are! I hope it all passes with no issues. Axel ate many things that had me in such worry, but he passed everything with no issues, the most similar would be broken up plastic that he swallowed in big pieces. I was also worried of him cutting up his insides but all was fine. We were advised to feed him a high fibre wet food for the exact same reason you were told to feed pumpkin. So I feel optimistic all will be ok

As unpleasant as this may sound… we were also told to dice up his poops to make sure it was coming out, because otherwise it could be wrapped up to well to see.
Very sorry to hear about Rourke collapsing also. Was he running around when this happened?