Certain food products must contain a minimum amount of crude protein and fat, and a maximum amount of crude fiber and moisture. Only foods that do not contain protein, fat or fiber (e.g., vitamins and minerals) are exempt from the requirement to guarantee that the foods contain those nutrients. In all cases, a guarantee to retain some moisture is required. Other nutrients generally have no requirements for nutritional guarantees, although some products are required to provide additional guarantees to support claims made on the label. If you are making additional claims on your pet food label, such as “high in calcium”, then you will need to include guarantees for the amounts of any nutrients that are included in your claims.