Purina Pro Plan Salmon and Rice for Adult Cats, Support your senior cat with Purina Pro Plan LIVECLEAR Adult 7+ Prime Plus Longer Life Formula dry cat food. This revolutionary, premium cat food simply and safely neutralizes Fel D1, a common allergen in cat saliva, with a key protein from eggs. It's shown to significantly reduce the major allergen in cat hair and dander by an average of 47 percent starting in the third week of daily feeding. Pro Plan senior cat food also supports the unique needs of your older cat with a proprietary cat dry food blend proven to improve and extend the life of cats age 7+.