Complementary pet food for cats and kittens over 6 weeks old. Developed with our nutritionists and veterinarians at The Waltham Centre.. Waltham the world's leading authority on pet care and nutrition. Whiskas Cat Milk is low in lactose (less than 0.1%) making it easier for your cat to digest than regular cow's milk,Cat milk and kitten milk with calcium to help support the development of strong bones,This milk for cats is free from artificial colours, flavours and preservatives,Complementary cat food with calcium and vitamins,Whiskas Cat Milk is suitable for kittens over 6 weeks of age and it contains calcium, known to support a kitten's rapid development and help support the growth of healthy teeth and bones