Production of animal feed

The present invention relates to the production of animal feed and in particular to the selection and enhancement of raw materials for use in animal feed production. A method of selecting and enhancing of feedstuffs for use in an animal feed product by analyzing the statistical distribution of the nutritional content of batches of the feedstuff and calculating the number of batches within a predetermined range of a desirable nutrient composition. The cost of enhancing the feedstuff by adding nutrient additives is calculated and batches of the feedstuff are accepted or rejected, with the enhancement step only applied to the accepted batches. The method can be applied to products such as soyabean meal and corn which are major constituents of animal feed. It produces a feedstuff with a lower than natural variance in nutrient composition and a guarantee of a desired nutritional composition without the need for systematic overformulation of the product.