Complete pet food for cats aged 11 years and over Appropriate energy to help avoid excessive body weight loss supported by an adapted protein/fat ratio Purina ONE® Senior 11+ is a nutrition targeted to answer the specific needs of cats aged 11 years and over. 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, along with the beneficial functional bacteria, all the key nutrients your cats 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.