In article ,
"Bob Eager" writes:

Amazing that no-one has yet produced a cat flap that reads the cat's
RFID chip, instead of the heavy magnets.

They have. One of my staff at a former job fitted one.
I think he had to import it. It reads the standard RFID
tags fitted to pets by the vets. You can program several
in (he has two cats).

--
Andrew Gabriel
[email address is not usable -- followup in the newsgroup]