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"Oldest living cat" is naturally a category where the title-holders change frequently as they finally succumb to advancing age. As well as an official record holder, there are numerous unverified records of longevity. Some of these contenders die before their claim can be verified while others are handicapped by lack of birth records. This means that the category is biased in favour of pedigree cats and against domestic moggies. Some of the unverified claimants achieve national fame through magazines or international coverage in news reports.
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In 2004, it was reported that the oldest living cat (verified) was a 27 year old Burmese called Kataleena Lady owned by Mrs V Hayward of Melbourne, Australia. Kataleena Lady was born on March 11th, 1977. In March 2005, a cat called Amber from west Wales was a contender for the oldest living domestic cat. Amber was a fully grown stray of 2 - 3 years old when adopted by Diane Sleeman of Ferryside in 1978. Diane believes Amber is approaching 30, which would make her almost 5 years older than the verified record holder, however Guinness World Records require evidence of Amber's longevity. Amber was toothless, but fit and healthy although less active than she used to be. Diane attributed Amber's longevity down to a diet which included hot cod, chicken and prawns in addition to regular cat food. In March 2005, the oldest living cat (verified) was 23 year old Spook from Ontario, Canada.
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A black and white British cat called Whiskey, rescued from a dustbin when a tiny kitten, was also a contender for the title of oldest cat at the age of 33 (unverified). Tiger, a tabby cat owned by Roy and Linda Gilbert of Coseley, near Dudley in the West Midlands was believed to be 27 years old in 2001. The previous oldie was Spike, who died in 2001 at the age of 31.
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A 31 year old (unverified) tomcat called Kiko was reported from a small village in Estonia in 2001. Although Kiko looked like a 10 year old, the vet believes him to be 31. Kiko's claim is based on that fact that he had been a present for the owner's 2 year old son; the son was 33 years old in 2001. Kiko had glaucoma, but was otherwise in good health. Kiko was believed to have reached this age because he did not roam, lived mostly indoors and had a good diet including egg and fresh milk. Kiko apparently still chased dogs.
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Data reffer : http://www.messybeast.com/longevity.htm