I have 3 cats. Only one is allowed outside (a rescue that was just too old to acclimate to indoors only). I'd like a cat door that
a. will only open/close for cat with the the sensor on collar (the one door on amazon that's highly rated only needs a sensor for cat to go in, but any cat can go out -- not sure why anyone would need that!)
b. is raccoon proof
My beloved Amazon has yielded nothing, so I hope someone here has an idea. TIA.