Purina pro plan junior cat optistart rich in chicken is a complete diet for kittens 1 12 months and pregnant or nursing cats in the first year of its life your kitten develops its natural protection system which will be responsible for its health for the rest of its life the immune system is the foundation of this protection your kitten builds a complex defence system that protects its whole body it offers protection for the digestive system skin and coat and urinary system young ca