5. Weight loss
Most cats lose weight as they get older. This is because their stomachs are no longer able to digest and assimilate protein properly, which leads to a loss of muscle mass. As a result, even if you think they are eating enough, you will notice that they are no longer gaining weight, but rather losing it more easily.
N.B.: Extreme weight loss can also be caused by diseases such as cancer, hypothyroidism or chronic kidney disease.
