SUPPLEMENT
SUPPLEMENT
TABLE 1 AAFCO Nutrient Nutrient
Units dry matter
Pronies for dog food-
Growth/reproduction
minimum
Adult maintenance
minimum
Maximum
ProteinArginineHistidineIsoleucineLeucineLysineMethionine-cystinePhenylalanine-tyrosineThreonineTryptophanValineFat1Linoleic
acidMineralsCalciumPhosphorusCa/P
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ratioPotassiumSodiumChlorideMagnesiumIron3CopperManganeseZincIodineSeleniumVitaminsVitamin
AVitamin DVitmain EThiamine4RiboflavinPantothenic
acidNiacinPyridoxineFolie
acidVitamin 12Cholineg/kgg/kgg/kgg/kgg/kgg/kgg/kgg/kgg/kgg/kgg/kgg/kgg/kgg/kgg/kgg/kgg/kgg/kgg/kgmg/kgmg/kgmg/kgmg/kgmg/kgmg/kgmg/kgmg/kgmg/kgmg/kgmg/kgmg/kgm B1 Presumes an energy density of 14.6 kj ME/g, based on the "modified Atwater" values of 14.6, 35.6 and 14.6 kj ME/g for protein, fat and carbohydrate (nitrogen-free extract), respectively. In rations > 16.7 kj ME/g, the concentration of all other nutrients should be increased proportionately; rations <14.6 kj ME/g should not be corrected for energy. 2 Although a true requirement for fat per se has not been established, the minimum level was based on recognition of fat as a source of essential fatty acids, as a carrier of fat-soluble vitamins, to enhance palatability and to supply an adequate energy density. 3 Because of very poor bioavailability, iron from carbonate or oxide sources that is added to the diet should not be considered as contributing to the nutritional iron in the diet. 4 Because processing may destroy up to 90% of the thiamin in the diet, allowances in formulation
should be made to ensure the minimum
nutrient level is met after processing.
ommendations, there are two separate AAFCO profiles (one for growth and reproduction and one for adult maintenance), instead of just one for all life stages. This allows dog foods formulated for the maintenance of adult dogs to contain lower amounts of some nu trients. Also, out of concern for the risk of nutrient excess, maximum limits on the amounts of calcium, phosphorus, magnesium, fat-soluble vitamins and most trace minerals in dog foods were established (Hazewinkel 1989, Hedhammer et al. 1974, NRC
1980, NRC 1987). Where specific data were lacking in dogs, data on other species were extrapolated. The new profile for growth and reproduction raises the minimum amount of fat required. In the practical experiences of the subcommittee members, this was deemed necessary to increase the energy content to appropriate levels. Also increased in both profiles are the levels of zinc and iron (Chausow and CzarneckiMaulden 1987, Saneckietal. 1982). On the other hand, the levels of calcium, phosphorus and sodium chloride