The Association of American Feed Control Officials (AAFCO) was formed in 1909 to establish a framework for uniform regulation of the feed industry. Although not a government agency, AAFCO operates within the guidelines of federal and state legislation including laws administered by the Food and Drug Administration (FDA) and the U.S. Department of Agriculture (USDA).
AAFCO establishes standards or models for regulations aimed at ensuring that manufacturers provide clear, accurate, and consistent information about animal feed, including pet food.
 
Every year AAFCO issues an official publication called the AAFCO Manual. This manual, in addition to listing ingredient definitions and feed terms, addresses labeling issues such as label format, ingredient lists, nutrition claims, and guaranteed analysis.
 
These model regulations are different than laws. However a large number of state governments have adopted AAFCO pet food model regulations into state law.
The “AAFCO statement of nutritional adequacy or purpose,” also called a “nutrition claim” or “complete and balanced statement,” identifies which life stage and/or lifestyle the product has been approved for. Under AAFCO regulations, this statement must be substantiated by the manufacturer.
AAFCO recognizes three methods for substantiating the claim:
AAFCO has outlined very specific protocols, or guidelines, for conducting feeding tests. The protocols specify test criteria including such things as:
Each life stage has its own protocol. Life stages are the same for both dogs and cats and are defined as:
A pet food with an 'All Life Stages' claim can be used from weaning through adulthood. This claim is considered an unqualified (absolute) representation of nutritional adequacy. If substantiated through feeding trials, the protocol for gestation/lactation and growth must be performed sequentially, using the same group of animals.
AAFCO regulations state that specific wording must be used when a diet is intended for special nutritional or dietary needs that require the involvement of a veterinarian for diagnosis, management, and follow-up.
Understanding the AAFCO statements for nutritional adequacy can help customers choose a high-quality diet that provides complete and balanced nutrition for the appropriate life stage of their dog or cat.
 
 Compared with humans, your favorite feline needs a high-fat, high-protein diet with certain animal nutrients. Cats usually eat many small meals throughout the day, so they easily adopt a free-choice feeding schedule to maintain their normal body weight. Dry foods, such as IAMS™ ProActive Health™ Adult Original with Chicken, are best suited for free-choice feeding because they stay fresh longer.
 
Cats need nutrients from animal-based protein sources. Providing the vitamins, minerals, protein, and other components found in a complete and balanced pet food can lead to a long and healthy life for your cat. It is important to avoid supplementing your cat's diet, as doing so may lead to a variety of health problems. When selecting a pet food, look for ones that offer the following nutrients:
A cat's energy intake should be increased gradually by up to 50% over her maintenance intake through pregnancy. You can use kitten food to provide nutritional support during the last few weeks of gestation.
After birth, the mother cat's energy needs increase by 50% to 75% over normal in the first week to twice normal the second week and to three times during the third week. The third and fourth weeks are the most demanding because kittens are still consuming milk and have not begun to eat dry or canned food. Once kittens begin weaning, the mother cat should be tapered back to normal food portions to avoid unnecessary weight gain.
Food and energy requirements may vary for your adult cat. In general, indoor cats have less opportunity or need to exercise than outdoor cats. As a result, indoor cats are more prone to obesity, and regular exercise should be encouraged. You may want to control your cat's portions and choose a cat food made to help maintain weight.
Cats spend a considerable amount of time grooming. In the process, hair can be swallowed and build up in the stomach. If the hairball doesn’t pass into the intestines, a cat may try to cough it up. A special diet can help decrease the likelihood of hairballs, but you may decrease its effectiveness if you combine it with other foods.