Inserting the microchip should not cause significant pain to your pet. The procedure, which is usually performed on puppies and kittens during their first visits to the vets, is quick and similar to a vaccination, and most animals tolerate it very well. It is administered under the skin, between the shoulder blades or at the back of the neck, and is done with a sterile needle. Some animals may experience mild temporary discomfort after insertion, but this is typically minor and brief.