Purina One Natural Blends Salmon and Brown Rice Formula Adult Cat Food is a balanced healthy diet for all adult cats.  I have 5 cats ranging in ages from 3 years to 17 years and with the help of Purina One they are all a happy, healthy and frisky bunch.  The fact that Purina One has all natural ingredients - my bunch favors salmon as the main ingredient - with little or no fillers or food coloring, is fantastic.  I had problems in the past with other foods because they contained food coloring and three of my cats were highly allergic - cleaning up half digested vomit on a constant basis was...