At the age of 31, the equivalent of about 146 human years, the Millie tricolor cat can be the oldest cat in the world. Stockport's resident, in the metropolitan region of Manchester, England, she gained fame for longevity and unusual routine, which includes mineral water, fresh shrimp feed, salmon, chicken and plenty of rest. Despite the impressive mark, the record is still not officially recognized for lack of documentation that proves her age.