Complications In Cat/Kitten Counting

When I first got in tonight, I thought I'd eye-balled everyone... Then there was the checking of water bowls, the topping off of food bowls, etc. Then, slowly, there was a sense of uncertainty... Where was AreToo? I told myself I'd seen him, he was fine, wherever he was right now. Nope. No way. Eventually the search led to the vestibule, aka the cat-lock, where he'd snuck in while I wasn't looking. AreToooooo....! AreToo responds, What?????