Pitbull, that's exactly what Cristy has been telling me. I think you two are right. *sigh* I can't help it, though, I HATE spending time scrubbing diarrhea off of things. He did it again a few minutes ago - I was with him and then I ducked out of the room for maybe a minute and came back to diarrhea everywhere. He hadn't been whining, barking, or otherwise indicating that he had to go; so it must have been sudden.
XP, most of the house is carpeted, but thankfully the carpets were safe this time.