For the pups we formulate our meals to be complete and balanced for adult maintenance (adults and seniors). When feeding Tom&Sawyer to growing puppies, you will need to add our Puppy Booster. The puppy booster is needed to ensure your puppy receives plenty of calcium and other minerals for their skeletal growth. Our cat meals are formulated to meet the nutritional needs for adult maintenance. At this time, we do not provide an additional supplement for growing kittens and therefore, we recommend feeding our cat meals to cats aged 8 months or older.Due to the extremely high demand for these minerals for skeletal growth in giant breeds, we discourage feeding only Tom&Sawyer meals for those breeds. Our meals can make a great topper for growing giant breed puppies, however. In addition, we do not recommend feeding our ultra-low fat line (Fisherman’s Best Friend, Rosemary Venison, and Kangaroo) to growing puppies unless there are specific dietary considerations and is in consultation with your veterinarian.