Febs is a feline of a certain age, and there are a number of conditions that are fairly common in older cats that can impact their behavior. For starters, I would want to rule out thyroid disease ...

Excessive vocalizations can sometimes be indicators of an underlying health problem, especially in older cats. Common conditions associated with increased meowing include hyperthyroidism ...

Researchers also found that cats that have not been neutered have a shortened life expectancy. They estimate this is because felines are more likely to have the procedure done as they get older.