An experiment was conducted to evaluate the use of animal by-products in broiler diets, formulated based on crude and ideal protein. The experimental design was a completely randomized in a factorial arrangement 2×2+1, with two animal protein sources (poultry viscera meal and bovine blood meal), two formulation concepts (based on crude and ideal protein) and a control diet based on corn and soybean meal, with four replications. The evaluated characteristics were weight gain, feed intake and feed: gain ratio. There […]