Royal Canin Baby Cat Milk is vital for the first few weeks of life, your kitten needs the correct nutrition to allow her to grow into a strong and healthy adult. When the queen's milk is insufficient due to large litter sizes or mother cat refuses to feed, a milk substitute should be given to the kittens. For steady, harmonious growth, the composition of Babycat milk is as close as possible to queen’s milk, with high energy and protein levels.