Purina One +Plus Healthy Kitten formula Dry Cat Food for Kittens, Ensure your kitten's sound nutritional footing with Purina ONE +Plus Healthy Kitten Formula dry cat food. Real chicken is the #1 ingredient in this high protein dry kitten food, which supports her growing muscles and delivers the yummy poultry flavor kittens crave. Purina ONE for kittens features a SmartBlend of high-quality ingredients, plus DHA, a nutrient found in mothers' milk, which assists with brain and vision development. We craft this natural kitten food with added vitamins, minerals and nutrients as well as accents of real vegetables, including real carrots and peas.