Complete pet food for adult cats. Purina ONE Neutered Cat is formulated with an adapted nutrient profile for neutered / spayed cats. Actilea? Natural Defence Science Actilea? is a unique nutritional formula within Purina ONE designed to help keep your cat"s natural defences strong and to deliver a wave of positive effects to help support her health, so you can enjoy her visibly great condition knowing she"s great on the inside too. Developed by Purina"s vets and nutritionists, Actilea? is a triple-action formula of yeast, prebiotics and antioxidants that starts acting in the gut, helping to support your cat"s natural defenses from within. Weight control supported by a higher* ratio of protein to fat (* + 15% vs the adult formula) Proven to reduce tartar build-up by up to 40%* *Purina Research Available in a wide range of tasty recipes made with high quality ingredients, Purina ONE with Actilea? formula helps support your cat"s healthy immune system today and tomorrow. No added colourants