Re: Skewed results
> On the subject of RFID-controlled entry to a house, some cat flaps have been sold for decades with a tag (a simple magnet I belive, not RFID) for your cat's collar, so that precious Snuggles can come in but nectdoors flea-bitten mangy moggy can't.
You can get cat flaps which read the cat's microchip, via RFID. My neighbour bought the same cat flap after seeing ours, each flap only lets in the moggie its been programmed for. Our cat initially took a few goes to learn to wait for the "click" (its about 2 seconds after RFID has been read, I think)
They are brilliant, if a little more expensive than the traditional collar-tag ones. Cat can lose collars especially if you use the snap-off ones (much safer for cat if it gets caught up somewhere), so something which reads the cat's microchip works well. 4x AA batteries last about a year, and if you're quick enough replacing them you don't need to shove the cat through again to reprogram it :-)
Of course it requires the feline in question to be chipped, but IMHO it should be anyway.