The dynamics of morphological and biochemical indicators of the blood received from heifers of Hereford breed of the Finnish selection who were delivered in “Nauka” breeding plant of Yegoryevsky district of Altai Region with new ecological and pro-duction conditions for them was studied. The blood testing of Finnish heifers was conducted in 1.5 and 2.5 months after their arrival in the farm and com-pared to the indices of the animals of the same breed adapted to local conditions. The quantity of erythrocytes, hemoglobin and leukocytes did not exceed physiological norm and was 6.3 higher (r <0.05) and 3.6; 25.8 and 10.2; 5.5 and 18.6 % respectively than in Siberian analogs. The dynam-ics of morphological indicators of blood in Finnish heifers was characterized by the decrease in 2.5 months after import in 19.7; 12.4; 8.2 % respective-ly that points to the reduction of functional tension of animals connected with adaptation. The results of researches showed that the tension of functional systems of an organism for protection against de-stabilizing environment factors in Hereford cattle of the Finnish selection at the initial stage of adapta-tion was expressed in the decrease in the quantity of erythrocytes by 19.7 % and the activation of granulocytic blood formation. For the indicators of protein and carbohydrate metabolism during the period the prevalence of globulin frac-tion of proteins (to 42.8±3.56 g/l - in the Finnish animals) and low concentration of glucose in com-parison with the Siberian analogs was characteris-tic. Mineral composition of blood (the level of calci-um and phosphorus) was within physiological range. The concentration of calcium and phospho-rus in the animals compared groups of essential distinctions did not differ significantly.