Nutrient Requirements of Dogs and Cats, a 400-page report by an international team of experts, is the most comprehensive assessment of the daily nutrient and calorie requirements for dogs and cats. Updating recommendations last made by the Research Council in the mid-1980s, the report provides nutrient recommendations based on physical activity and stage in life, major factors that influence nutrient needs. It also looks at how nutrients are metabolized in the bodies of dogs and cats, indications of nutrient deficiency, and diseases related to poor nutrition.
Food and Drug Administration -Center For Veterinary Medicine Selecting Nutritious Pet Foods
The following consumer information is provided by David A. Dzanis, D.V.M., Ph.D., DACVN
Division of Animal Feeds, Center for Veterinary Medicine. November 1997
The new nutrient profiles replaced the recommendations of the National Research Council (NRC) as the AAFCO-recognized authority on canine and feline nutrition. Dog and cat foods labeled as “complete and balanced” based on the AAFCO Dog or Cat Food Nutrient Profile must meet all the nutrient minimum and maximum levels as established by the Subcommittee. <snip>
Please go to site to see the tables they have there on feeding trials: