...Kitty. Duh.
I finally asked Jacob, "Is Kitty a boy or a girl?" And he responded, with just as much derision and condescension as an almost-two-year-old can possibly dredge up, "No, it's Kitty!" He didn't go on to say, "Geez, Mom, how can you ask such stupid questions?" but I got the message.
Just for fun... here's the first meeting between Jacob and Kitty. Kitty is very much grungier now, but that's just love.