Apparently there was more to say about the last strip than I thought. The issue of Scratch's public sentience is burning up the comments. I don't really care much. I don't recall a time when other characters were clearly communicating with Scratch, so I just assumed this was the first time it had been revealed.
If someone can find a strip that proves this to be a retconning, huzzah, we will dine out on Kurtz' mistake for weeks. But even then, it wouldn't make me sad, just irritated.
Cole's mistake in today's strip (The Cat Whisperer) was using the ill-advised "tchk" noise, which, in my household, is reserved for calling squirrels. He would have been much better served by the more soothing "pssspssspsss."
By the way, what the heck is that schmutz falling away from Scratch in the last panel?