Unlike people tattoos, tattoos on animals are not for decoration, but for conveying information. Some surgical incisions such as those from a spay or neuter surgery heal so well that no evidence is left behind that entry was ever made. If your pet is lost or there is an unexpected emergency and somehow ends up in a shelter with no identification, it is possible a vet could perform unnecessary abdominal surgery thinking the animal has not been spayed or neutered. This tattoo is meant as an indicator of the sterilization status of these animals thus preventing unnecessary surgery later in life. It can save time, effort and money, prevent invasive, painful surgeries your pet does not need and save lives.