Blood is a particular circulatory tissue that transports waste products of metabolism to the kidneys and liver and supplies the essentials of life to all of the body's cells via vascular channels. Blood serves a variety of purposes, including preventing excessive blood loss through the formation of blood clots, transporting oxygen and nutrients, and transporting cells and antibodies that fight infection. Blood is a vital and reliable tool for determining an individual animal's health status. Blood is made up of both formed elements and plasma constituents. Cells of produced elements include white blood cells (leukocytes) and red blood cells (erythrocytes). These cells are counted using a variety of method. Blood parameters, such as haematological measurements, have long been recognized as useful markers for determining an animal's physiological, nutritional, and pathological condition