I currently have two racks, CB-70 and a custom rack from Jwexotics(made of wood ) can anyone give me a hand figuring out how to lock them so the kitten cant open them. She is showing much interest in the racks and my fiance is afraid she is going to get a tub open. So for peace of mind I need a lock on these I just have no idea. The little pins for the CB70 dont work the little guy just ripped out all the pegs. We currently leave the bedroom door closed while we are at work.