Does My Dog Need a FI Nano Microchip if They Have Already Been Microchipped? January 31, 2022 14:58 Updated No, you will not need a Fi Nano microchip for your dog if they already have a microchip.❗️Dogs should not have more than one microchip. If your dog already has a microchip you should not have them microchipped again with a Fi Nano.❗️ Related articles Is Fi Nano Microchip Available Near Me? How Does Fi Nano Microchip Work? How Do I Register My Fi Nano Microchip on My Mobile Device? Do I Need to Have AT&T as My Mobile Carrier to Use the Fi Collar? Why Do I Need One Subscription/Membership Per Fi Collar?