For mature cats as well, immunity for certain diseases lasts longer than one year. (sunnysidevetclinic.com)
The age of tumor onset has two peaks, one in early adulthood at about two years of age and a second in mature cats aged 6 - 12 years. (brittonroadveterinaryclinic.com)
Plus, it's formulated specifically to help meet the needs of mature cats. (bluebuffalo.com)