Purina ONE Light is specially formulated to help your cat to reach and maintain her healthy weight without compromising on taste. Purina ONE Bifensis is a unique nutritional formula with beneficial functional bacteria scientifically proven to help support your cat\'s natural defences from the inside out. Developed by Purina vets and nutritionists, Purina ONE Bifensis contains, along with the beneficial functional bacteria, all the key nutrients your cat needs, including Omega 6 fatty acids. Its 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.