Purina ONE Dry Cat Food with Chicken and Whole Grains is specifically formulated to meet the nutritional needs of adult cats (aged 1-7 years) who need a complete and balanced diet to help stay in the best of health. Purina ONE Bifensis is a unique nutritional formula with beneficial functional bacteria plus all the key nutrients your cat needs, including Omega 6 fatty acids. It's scientifically proven to help support your cat's natural defences from the inside out. Bifensis' dual defence formula works in parallel on the inside, by helping to support your cat's natural antibody production, and on the outside by maintaining healthy skin and coat. It also helps to reduce tartar build-up reduction by up to 40%*.*Purina Research