Abstract
The two farms were conducted experiments with added preparation Biopolym FZT for rearing calves. Additions were applied in the operating conditions where the first farm was gradually calves continuously supplemented to the barn. On the other farm was loading section, and after three months, the calves are picked once. Experimental groups were added preparation Biopolym FZT to supply water for the entire group. The first attempt to farm the results were not significant due to the occurrence of diarrheal disease. In the second company in the experimental group were found higher weight + 0,141kg/day gains than control groups. Between the detected blood parameters in the control and experimental groups was not statistically significant. The results were within the reference range. The tendency Impairment of copper in the blood heifers are similar within the region and in the future could have an adverse effect on reproductive performance. On the data logger ammonia and carbon dioxide, located in the barn were no significant differences in measured values. Values of N-compounds in the feces of calves in both were statistically significant. There was a certain tendency in reducing the average values of N-compounds in experimental groups of calves.