ROYAL CANIN® Mother & Babycat Loaf is formulated with the nutritional needs of the mother and her kittens in mind. This food is suitable for gestating or lactating queens as well as 1 to 4 month old kittens during their 1st age. Between 4 and 12 weeks after birth, the natural immunity acquired from the mother's colostrum (a milky secretion rich in protective antibodies) gradually decreases.