How do microchip cat flaps work? While regular pet doors let any animal walk into your home, the best microchip cat flaps restrict access to selected pets only.
When a cat is microchipped, a tiny chip containing a unique number is implanted under their skin (usually between their shoulder blades). When a vet scans it, information about the pet and their owner can be displayed from a database, helping to reunite them if they ever go missing.
