Me, too!!! I have a extra large one (can fit two cats but I got it for Miss Gracie) and one regular size one (for Tigger) plus an extra one (large) just in case the door or something breaks on one of mine....or a neighbor or someone needs one and doesn't have one.

I feel better knowing they're there. They sit right beside the door that leads inside from the garage. I have to keep them out in the garage because Gracie associates them with going to the vet - and freaks!