If a cat is deaf, it will appear in low spirits, unresponsive to the owner's calls, and have a loss of appetite. It is necessary to take the cat to the hospital for examination to see if it can be treated. Deaf cats need to be raised indoors and cannot be allowed outside. When petting the cat, you need to look at it from the front, otherwise it will easily scare the cat. Especially when the cat is sleeping, it is best not to disturb it.