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The aim of the present study was to establish the economic effect of supplementing the combined feed of growing pigs with the Bulgarian biologically active plant additive VemoHerb. Data of the experiments carried out in the period 2003 – 2008 with 202 pigs of different categories were processed in order to find out the effect of the product VemoHerb on some economic parameters. The results of the conducted economic analysis show that VemoHerb supplemented to the combined feed of starter and growing pigs under the conditions of the carried out experiments, led to a reduction of the expenditures per 1 kg of weight gain and an increase of the notional profit per 1 kg of weight gain, compared to the control group without the growth stimulator.