Weaning, Body weight, Amino acids, Proteins, Genotype & phenotype, Cattle, Efficiency, Agronomy, Nutrients, Food, Natural resources, Excretion, Feeders, Threonine, Breeding, Methionine, Tryptophan, Nitrogen, Gene expression, Fatty acids, Feeding, Hogs, Animals, Diet, Acids, Lysine, Nutrient content, Weight reduction, Feeds, Factorial design, Feed efficiency,...