Sterilised To prevent obesity in neutered cats. Happy Cat Adult Sterilised was specially developed for neutered cats. This filling diet, tasty and full of roughage contains only 10.5% fat, but lots of nutritious proteins from salmon and poultry. All in One is a novel nutritional concept for cats, appropriate for all lifestages. The formula is characterised by the following features: hairball control, taurine and plenty of animal protein, pH control for urinary tract health, tooth care, omega-3 and 6 fatty acids for healthy skin and haircoat, together with our guarantee of a very special taste experience and the unique Happy Cat Natural Life Concept.