ULTRA Weight Management Dog Food helps overweight and less active dogs achieve and maintain a healthier weight. This premium natural diet dog food features a perfect combination of three lean proteins, sun-ripened fruits and vegetables, whole grains, and pure sunflower oil to help support vital functions and a healthy immune system. ULTRA Dry Dog Food, made with wholesome, natural ingredients, provides complete nutrition to help your dog live long and thrive.ULTRA Weight Control Dry Dog Food helps overweight or less active dogs achieve a healthy weight, while other key nutrients nourish their joints, promote a healthy immune system and heart, support strong muscles and give them healthy skin and a shiny coat.At The Nutro Company, we have a long history of making great pet food since 1926, in fact. And from the beginning, weve been leaders in pet nutrition. Our quality products, high standards, long heritage and pet-loving people make all the difference.