Productivity of poultry and pigs is similar or slightly improved by dietary inclusion of processed animal protein (PAP). In some studies it was demonstrated that gut health was improved by dietary inclusion of PAP. The risk for feather pecking and cannibalism in layers may be decreased by use of PAP. In all vegetable diets higher supplementation levels of free amino acids, minerals to the diet should be used in order to meet the nutrient requirements of the animals. Inclusion of PAP in compound feeds for poultry and pigs enlarges the matrix of ingredients rich in protein.