RFID pet door

A radio frequency identification pet door, the pet door comprising:

• an RFID reader to read an RFID tag on a pet;
• a lock, coupled to said RFID reader, to control access through said pet door in response to an RFID signal from said RFID tag;
• wherein said RFID reader is able to read a pet identification code from both:
• i) a sub-dermal RFID tag;
• and
• ii) a collar-mounted RFID tag;
• and
• wherein a given pet has a collar-mounted RFID tag and a sub-dermal RFID tag;
• wherein said lock is controlled to selectively allow access of a pet with a said sub-dermal RFID tag, a pet with a collar-mounted RFID tag and said given pet with both said collar-mounted RFID tag and said sub-dermal RFID tag through said pet door responsive to a respective said pet-identification code read from the RFID tags;
• and
• wherein said sub-dermal RFID tag operates at a first frequency said collar-mounted RFID tag operates at a second, different frequency;
• wherein said first frequency is in the range of 125 KHz to 134 KHz;
• wherein said RFID reader has an RF communications bandwidth spanning both first and second frequencies;
• said RFID pet door further comprising:
• a frame mounting a moveable flap, wherein opening of said moveable flap is controlled by said lock;
• a tunnel attachment to said frame;
• and
• an antenna of said RFID reader mounted on or adjacent said tunnel;
• wherein said tunnel extends away from said moveable flap.