Cats with one or more notches in their ears are often called "ears cut". This refers to the process of manually cutting off a part of a cat's ear to make it shape into one or more notches.

This practice is usually used to mark that domestic cats or stray cats have been sterilized and/or have undergone other medical procedures. The gap in the ear is a clear sign, which means that these cats will not be caught or treated again. In addition, it also helps to protect them from malicious humans, because cats with ears cut are usually considered as ownerless cats or cats taken care of by the outside world.

Although it seems rude, it is a practical and effective way to manage the number of stray cats and ownerless cats. If you find a cat with a broken ear, don't panic. It's just a common practice, which means it has been taken care of and cared for. However, if you find a seamless cat, especially in the area where stray cats gather, you should be careful, because it may not get the necessary medical care, be susceptible to certain diseases, or need help and support from the shelter.