There really is no maintenance required for microchips themselves, although you do need to register the microchip and keep your contact information up-to-date in the microchip registration database. If you notice any abnormalities at the site where the microchip was implanted, such as drainage (oozing) or swelling, contact your veterinarian. Ideally, the microchip should be scanned during your animal’s regular wellness/preventive care exams to make sure that it’s still in place and working as it should.