Abstract: Zinc oxide and zinc carbonate are dry blended with proteinaceous feeds for dairy cattle and beef cattle to protect the protein against rumen digestion. Although zinc oxide and zinc carbonate have limited water solubility and are not prereacted with the protein, milk production in dairy cattle and rate of weight gain in beef cattle can be increased in relation to protein intake.

Abstract: This invention encompasses protein-protected ruminant feed comprising a pelleted admixture of unhydrolyzed proteinaceous meal and a ruminant-edible water-soluble zinc salt providing zinc ions in aqueous solution, said zinc salt being present in an amount providing a 0.25 to 1.3% zinc ions based on the dry weight of the proteinaceous meal, this feed having been prepared by intermixing said zinc salt with said proteinaceous meal, and forming the mixture into pellets. The large amount of zinc protects protein in the rumen of cattle and provides for more efficient utilization of feed protein.

Abstract: Dry mixes of zinc salts with particulate proteinaceous feeds for ruminants decrease the rumen digestibility of the protein thereby increasing the nutrient value of the feed to the ruminant. The zinc salts are incorporated as powders external to the particles of feed material. The protective action against micro-organism attack on the protein is provided in the rumen. The dry mix feed materials can be used with beef and dairy cattle and sheep.

Abstract: This invention is concerned with improvement in the nutritive value of soybean meal and other oil seed proteinaceous meals for feeding cattle. The improvement is accomplished by treating the meals with a water-soluble zinc salt to provide zinc ions for reaction with the protein. The treatment reduces the rumen digestibility of the protein of the meal and thereby improves its nutritive value.

Abstract: A meat pumping process employing a readily dispersible, soy protein isolate which is non-gellable upon heating and which has a polar lipid material on the surface thereof.