Twenty newly born suckling Frieslan calves were divided into four similar groups (5 calves each) after fed one week on colostrums and fed on ration supplementation with the same level of zinc methionine as their dams (Shakweer at all. 2005) (0.00, 40, 80 and 120mg zinclheadlday NRC (1988) during their 120 days sulking period to study the effect of zinc methionine supplementation on nutrient digestibility , feed efficiency , and calves performance , Rumen and blood parameters were also investigated ,Calves were individually led on rations consisted of starter . berseem hay and assigned whole milk. Results indicated that addition of zinc methionine increased (P<0.05) the digestibility of all nutrients which was reflected on the nutritive values (as TDN .DCP ) . Addition of 40mg zinc methionine (hid showed higher calves daily gain than that oi the other levels or that of the control group . Concerning rumen parameters , results showed that although higher total protein, pH and volatile fatty acids ( TVFA‘s) were increased by increasing the level of zn methionine supplementation in the ration , yet ammonia-N was decreased . Generally it cold be concluded that addition of 40mg zinc methionine ihld improved nutrient digestibility. feed efficiency and Friesian suckling calves daily gain