Abstract
The use of recombinant proteins in diets has a positive effect on animal health, promotes intestine recovery and the creation of beneficial microbiota in the gastrointestinal tract. The article contains the results of research in which the effect of 
 frozenthawed milk of goats producing recombinant lactoferrin on hematological parameters and productivity of calves at the age of 1-30 days was studied. Morpho-biochemical blood parameters were found to be within the physiological norms. The use of goat milk containing recombinant human lactoferrin in the diets of calves in the amount of 0.44-0.66 kg/head per day allows to increase the average daily live weight gain by 10,1-11,0% and reduce feed costs by 7.5- 7.7%.
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