Research was performed on Tsigai, Merino of Cluj, and Corriedale breeds. The main blood constants: glicemy, cholesterol, total proteins, albumins, globulins, gamma globulin, creatinine, urea and iron, were determined in order to establish the feeding metabolism. Types of hemoglobin in young studied sheep also were determined, using electrophoresis on paper. The analyses of hemoglobin type performed on experimental groups show that in Tsigai prevails B hemoglobin type. Both B and AB hemoglobin types were identified in
Corriedale and Merino of Cluj, prevailing B type. The main biochemical parameter frames in the normal physiological limit, emphasizing the diet balance in all nourishing principles.
