The aim of this study was to investigate the effect of the addition of different amounts of organic selenium (ALKOSEL® R397) in concentrate mixtures on the selenium content in the blood plasma and feces of ducks. The experiment was performed on 240 one-day-old ducklings (Cherry Valley) which were freely selected into 4 groups, one control K0 group, and three experimental K1, K2 and K3 groups. In two phases of feeding in fattening, ducklings were fed with two and nutritionally different concentrate feed mixtures: starter (from 1 to 14 days) and finisher (from 15 to 49 days of fattening). The control group of ducklings (K0) during feeding received food without added organic selenium in both phases of fattening. In both phases of fattening, the experimental group of ducks K1 was fed with food as well as the control group, but with the addition of 0.2 mg/kg of organic selenium, while the experimental group K2 used food with 0.4 mg/kg, and the experimental group K3 with 0.6 mg/kg of organic selenium. The addition of organic selenium to duck feed had the effect of increasing selenium content in both blood plasma and duck feces. The highest content of selenium in blood plasma and feces was determined in the group of ducks that received the highest amount of organic selenium through food during the entire experiment.

The aim of this research was to determine the actual data available to the dairies and to compare them with the statistical data. The actual data obtained from dairy can be used for further research and development of the dairy sector. Dominant production system in BiH are small farms (3‒5 cows) dealing with mixed livestock production, with the primary goal of self-sufficiency of which only 3.5% are farms with more than 20 dairy cows. The data used in the paper were derived from statistical agencies, as well as own research in the 7 largest milk processors in B&H (purchase about 86.10% of total milk in B&H). The number of dairy farmers of these 7 largest milk producers was 9.865 in 2015 (and 15.311 in 2012), who owned a total of 49.865 dairy cows in 2015 (42.364 in 2012). Average per producers of raw milk was 5.05 cows in 2015 (or 2.77 cow per producer in 2012). Average milk production per dairy cow was 4.149 L in 2015 (and 4.026 L in 2012). E‒class quality of milk is only 77% from the deliverables milk and 68% from the number of samples.

The research objective was to monitor and compare the quality of corn silage on farms in the period 2008 - 2012 by years of the research. The analysis of corn silage was done at 65 farms in the northern part of Bosnia and Herzegovina, where is the largest production of raw milk - about 85 % of total production in Bosnia and Herzegovina. The medium value of crude protein (CP) per years of the research is 6.94 % in 2008; 6.82 % in 2010 and 6.31 % in 2012. The acidity (pH), the medium value per years of the research is 3.81 in 2008; 4.03 in 2010 and 4.01 in 2012. The medium value of crude cellulose (SC) per years of the research is 31.69 % in 2008; 31.9 % in 2010 and 33.99 %  in 2012. The moisture con­tent (SV), the medium value per years of the research is 68.48 % in 2008; 68.75 %  in 2010 and finally, 68.43 % in 2012.

The main goal of the research is to determine the conditions of welfare and housing of farm animals for milk production. Milk producers in the region of northeastern BiH are not informed enough about the protection and welfare of animals. This research was conducted in May 2012. The results were obtained on the basis of the questionnaire methodology in five freedoms in the welfare and accommodation of animals (Webster, 1987). Farms are divided into three groups, farms that have up to 5 dairy cows (they are in majority in the region), farms that have up to 20 dairy cows and farms with more than 20 dairy cows. On farms that have up to 5 dairy cows all farms posses tied system of keeping cows and cows are kept in closed conditions. Farms with up to 20 dairy cows also a large percentage of 67% related to the system of keeping cows in indoor conditions. A smaller part of the farm has a free system of keeping cows and stables open with good light and ventilation. Only 16% of farms with more than 20 dairy cows are tied housing system and the rest of the free system of keeping cows. All farms meet freedom from hunger and thirst, but the big problem is freedom from discomfort, freedom from stress and fear, freedom of injury and illness and the freedom to express natural behavior. The research was carried out within the project "Improvement of milk production in northeastern Bosnia and Herzegovina" funded by the Development Agency of the Czech Republic.