From the mid to late 1990s, definitely. Not so convinced after that.

There’s a short summary in this article:
IFL Science: Pavlov’s Dog Experiment Was Much More Disturbing Than You Think

I’m not certain on the accuracy of everything it’s saying, but other sources at least seem to agree he was originally studying digestion, and cut holes in the dogs’ throats so the food would fall out when they ate.

If there’s any form of argument or debate, everyone cares about the correct spelling and grammar of their opponents.

When adults said things like “In this day and age, nobody says please and thankyou any more”, I misinterpreted “this day and age” as “The Stayan Age”, which was our current age, which obviously followed on from Bronze Age, Iron Age etc.