However, most herbivores are mammals and include animals such as rabbits, elephants, manatees, deer and many more. When you raise the protein level in farm animal feed, farm animals will eat more food and digest it more efficiently, in turn increasing the amounts of amino acids and nutrients available to the animal. In dairy cows, an inadequate supply of amino acids will result in reduced milk production. In poultry, an overall reduction in the size and quantity of eggs produced …