Symmetrical cropping of cat ears is a practice usually done to make them look cuter or more visually appealing. However, there are some other reasons why someone might decide to crop their cat’s ears. For example, some people may believe that doing so will reduce a cat's tendency to bite people or things, as cutting off part of an ear may reduce a cat's hearing, making it harder for them to hear sounds around them. However, ear cropping doesn't really solve these problems, and the practice can cause pain and discomfort to the cat. Ear cropping is a surgical procedure that can lead to infection, bleeding, and other complications.
Additionally, cropping part of the ears changes the appearance of the cat and may make them look unnatural or unbalanced. Therefore, it is recommended not to crop your cat's ears, but to try to solve the problem through training, correcting bad behavior, and providing appropriate channels. If you have concerns about your cat's biting or chewing behavior, it is recommended that you consult a veterinarian or a pet behaviorist who can provide help and guidance.