I'm doing my research to find an acceptable RFID reader that can read tags at the 125kHz, 128kHz, and 134.2 kHz regardless of data packet format.

So far I have found RFID readers that read the 125kHz tags, but only EM4001 tags. Specifically I need to be able to read the microchips implanted in pets.

Anyone have any ideas on where to look?