The research has been accomplished in the Department of Anatomy and Physiology of the Lithuanian Veterinary Academy, in the Research Center of Digestive Physiology and Pathology and in the Center of Practical Training and Experiments of the Lithuanian Veterinary Academy in 2005 - 2007. The study consists of 50 pages. There are 3 tables, 13 pictures and 5 appendixes presented in it. In order to achieve high cattle productivity it is very important to establish optimal conditions for neonate calves breeding, to stimulate development of digestive tract and activate development of useful microflora, especially on the first month of calves breeding. The purpose of this work was to determine the influence of probiotic “Yeasture” to growth, wellness and microflora of the digestive tract of neonate calves, feeding probiotic to the calves on the first month of age. The experiment has been accomplished on Lithuanian-White neonate calves throughout the indoor period from November to January. Two groups of neonate calves were organized: control group (n=8) and experimental group (n=8). Calves of the experimental group were made to drink a preventive dose of the probiotic “Yeasture” every day, id est 5 g per day according to recommendations of the manufacturer. When the neonate calves were fed with the probiotic “Yeasture” supplement for the first month of age, their daily overweight had increased averagely by 16.1 percent. Probiotic “Yeasture” had no influence to daily overweight on the... [to full text]