Extruded SoybeansExtruded soybeans provide an excellent balance of essential amino acids, and are high in lysine (the first limiting amino acid for horses). Horse Guard Inc. uses only full-fat extruded soybeans in our soybean-based products. The feedstuff provides your horse with high levels of protein and fat, approximately 35% protein and 20% fat. Do not attempt to feed your horse raw soybeans. Processing is needed to denature urease and trypsin inhibitor, which act as anti-nutritional components. The extrusion process also breaks down the primary bond holding the chain of amino acids together making them more easily digestible to the horse. The process of extrusion increases digestibility by as much as 30% compared to pelleted products, and as much as 40% compared to whole grains. Extruded feeds also encourage chewing, which in turn increases saliva production. Saliva contains buffers that are essential for preventing gastric ulcers.
Soybean MealA less desirable soybean product for horses is soybean meal. Soybean meal is the most common form of soy used in horse feeds. Soybean ‰ÛÏmeal‰Û is a by-product of soybean oil extraction. In order to extract the oil one of two processes is used; pressure or solvent extracted. Solvent extracted is the most common extraction process to create soybean meal, which can leave chemical residues behind. The feed is high in protein but the energy from the fat of the oil has been reduced down to approximately 5%.
Other Forms of Soybeans
Other forms of soybeans that can be fed to horses are roasted soybeans, micronized soybeans, soybean flour, and soybean flakes. Although much less common than extruded soybeans or soybean meal, these are high-quality feedstuffs that are high in protein and fat.