The graying of a cat’s beard is not necessarily due to old age, but may also be caused by malnutrition, disease, stress, genetics, etc. If the cat has other abnormalities, it is recommended to go to the hospital for examination. A cat's beard is very important to the cat, and the beard will grow back 1 to 2 times a year. If you pay attention to supplementing the cat's nutrition at ordinary times to avoid malnutrition, there is basically no major problem.