It is designed to meet all of the nutritional needs of your special pet. Fresh chicken and egg make an ideal protein blend. Plus whole grain brown rice, the No. 1 carbohydrate ingredient in our Kirkland Signature Super Premium Adult Dog Chicken, Rice & Vegetable Formula, is a highly digestible carbohydrate source. This chicken formula is enhanced with probiotics for optimal digestive health and is enriched with garden vegetables, fruits and herbs. Ideal Protein Sources: This formula is made with fresh chicken as the number one ingredient. Size: 40 lb.