What is an Ear Tip?
Eartipping is an effective and universally accepted method to identify a spayed or neutered community cat. Eartipping is the removal of the distal one-quarter of a cat’s left ear, which is approximately 3/8 inch, or 1 cm, in an adult and proportionally smaller in a kitten.
This procedure is performed under sterile conditions while the cat is already anesthetized for spay or neuter surgery. There is little or no bleeding, it is relatively painless to the cat, and the eartip does not significantly alter the appearance or beauty of the cat.
Eartipping is the preferred method to identify spayed or neutered and vaccinated community cats, because it is difficult to get close to them and therefore the identification must be visible from a distance. Community cats may interact with a variety of caregivers, veterinarians, and animal control personnel during their lives and so immediate visual identification is necessary to prevent an unnecessary second trapping and surgery.
Credit: Alley Cat Allies https://www.alleycat.org/Eartip