a) Functions of protein in the body of farm animals are: (i) Growth (ii) Sustenance of life and proper functioning of the body. (iii) building flesh. (iv) Repair and maintenance of worn-out body tissue. (v) Building protective covering such as hair, nails, horn, hoof, wool and feathers. (vi) Formation of milk and egg. (vii) Formation of digestive juices and other secretions of the intestine. (viii) Synthesis of enzymes. (ix) Synthesis of hormones. (x) Production of antibodies. (xi)- Formation-of gametes in reproduction.
(b)(i) Sources of animal protein in livestock feed are: fish meal, blood meal, collostrum, liquid or whole milk, skin milk powder, termites / insects,feather meal , earthworms , poultry offal meal , maggots, shrimp head meal, eggs, whole milk powder, meat, meat meal.
(ii) Sources of plant protein in livestock fee are: groundnut cake or meal, palm kernel cake or meal, soya beans meal, cotton seed cake, sun flower, seed meal, cashew nut meal , leguminous forage, cowpea.