Quote Originally Posted by king2005 View Post
If you want the cat to be an indoor cat, then get a collar that'll go off (spray or static) if they go near the kitty door.

I just got Cam one of those & it now allows me to give her more free room without having to worry about her getting eaten.
Yeah, King's right. Getting the spray or static collar for the one kitty you want in is a lot cheaper than getting the door with magnets on the collars of the cats that CAN go outside.