Well, more accurately collarless. Timmy removed his collar about 1 month ago and I know where it is, but really he'll just get out of it again. Timmy and the collar is a constant tug-of-war. So this is no surprise.
Turtle on the other hand is the "good" kitty and usually has her collar on. Last night however, I noticed it was missing. And I have NO idea where it is.
Then this morning, they are running around after each other like wild kitties making crazy kitty noises. This happens on occasion, but while they are collarless they seem especially crazy.
Crazy, naked kitties.