All pets should wear collars with tags that identify them and provide your contact information, but tags may become worn and impossible to read or may slip off. A microchip is the only form of pet identification that is permanent, with a unique number that cannot be altered or removed. Pet microchips are not tracking devices; however, if your pet is lost and brought to a shelter or veterinarian’s office, their microchip can be scanned, showing your contact information to reunite you and your pet.
A pet microchip, the size of a grain of rice, goes under your pet’s skin. The procedure is simple and similar to administering a vaccine or a routine shot. The process takes only a few seconds, with no anesthesia or sedation is required. After your pet is microchipped you can apply for a lifetime license!
Northampton County: https://www.northamptoncounty.org/FISAFF/REVENUE/Pages/DOG-LICENSES.aspx