how-does-a-microchip-work, how does a microchip work,how does a microchip work in a dog,how does a microchip work in a cat,how does a microchip work for dummies,how does a microchip scanner work,how does a microchip feeder work,how does a microchip reader work,how does a microchip cat flap work,how does a microchip actually work,how does microchip work in human