What you feed your kitten in her first year of life can have a lasting impact on her growth and development, as well as her overall health. That's the idea behind BLUE Longevity for Kittens. It's a nutrient-rich, optimal-calorie diet that will satisfy your kittens hunger and help prevent her from gaining unhealthy weight. Whets more, Longevity for Kittens helps support her specific needs with ingredients that have been shown to help with: muscle growth; cognitive development; strong teeth and bones; immune system health. Nutrient-Rich Ingredients. Lower Caloric Density. Taste Cats Love: BLUE Longevity for Kittens is a healthy and delicious blend of lean protein, nutrient-rich vegetables and fruits and wholesome whole grains.