Prolonged training and physical effort in endurance horses can influence the performance of the endurance horses negatively. The negative impact of the event is especially noticeable if venues are demanding, i.e. bad weather conditions or demanding grounds, high altitude and especially in cases of insufficiently fit horses. One of the most important factors that influence equine performance is abundance of oxygen in the blood, which is directly related to the air oxygen content and changes with atmospheric pressure, so that high altitude and low air pressure demand additional work from horses and accelerate fatigue. The authors goal was to investigate the influence of workload in endurance racing on sport horse organism. A total of 18 trained and competing endurance horses enrolled in a 60 km long endurance race organized on Zlatibor Mountain were included in our survey. Due to the difficult track 8 horses were disqualified due to lameness, and high heart rate and respiration. Only 10 horses completed the race and these animals were submitted to basic physical, clinical and laboratory examinations, in order to evaluate fatigue and stress reaction in endurance horses in Serbia. Results of the clinical and laboratory testing obtained show significant changes in all parameters evaluated which we attributed to physical effort in all 10 horses that finished the race in comparison with the values obtained before the race. In conclusion, 10 horses finished the race and were tested, and they indicated significant alterations in physiological parameters showing stress reaction. The evaluated parameters decreased into physiological interval values during the 5 days following the race.

This study was to determine how to investigate the effect of using triticale on growth performance, production and slaughter characteristics of broiler chicks. The research was carried out on 400 for feeding chickens, hybrid Ross 308. The first diet was the standard starter, grower I, grower II and finisher and served as control. The other rations contained 7.5%, 12%, 15% and 18% triticale as graded replacement for maize and wheat. The experiment lasted eating chicken 49nd days. Based on recorded productive traits of examined chicken groups in this investigation conclusion can be drawn that the best results is achieved C-group of chicken for mortality, feed conversion, production index, average body weight of chicken before butchery, handled and cooled carcass weight after 49 days of age.

The main purpose of the study was to determine the effect of egg mass and egg weight groups (group I eggs under 160 g, group II egg mass 160 g to 180 g and group III eggs over 180 g) on incubation results, loss of egg weight (moist) during incubation, gosling hatchability and the relative share of the gosling in the egg mass. Eggs with mass between 160 g and 180 g (group II) demonstrated the highest fertilisation rate (91.28 %) and the highest hatchability out of the number of incubated eggs (83.14 %), while the eggs from the group I (lighter than 160 g) showed the highest number of gosling hatchability out of the number of fertilised eggs (91.08 %). The lowest embryo mortality was that of the group I (5.17 % and 6.06 %), while the highest is reported for the group III (14.29 % and 16.67 %). The lowest relative loss of egg mass (moist) by day 25 of the incubation period was established for the group I eggs (10.98 %), and the highest for the group III (11.71 %), with a statistically significant (P<0.01) difference of -0.73 %. Other differences were not statistically significant (P>0.05). Gosling percentage in the egg mass was significantly higher (P<0.001) in the group III of incubated eggs (67.81 %) than in the group II (66.61 %) and the group I (65.24 %).

Numerous studies have shown that a mare can develop a uterine infection that causes signifi cant economic losses in horse breeding. Assessment of the reproductive system in breeding animals in our country has been rarely carried out, however this is a common or compulsory practice in countries that have developed horse breeding. Th is paper describes the importance and diff erent techniques for the use of double protected swabs in the diagnostics of bacterial infection of the mare uterus in order to improve their fertility.

The aim of this paper was to examine the biochemical and haemological parameters of blood as well as the quality of breast meat of 45 pheasants. The pheasants were divided into three groups and fed by mixtures with the organic selenium supplementation in concentrations of 0.2 mg/kg (I group) and 0.3 mg/kg (II group)and with mixture without selenium in a control group (K). After 60 days of the experiment duration it was determined that the average values of selenium content in the breast meat in blood serum of II group pheasants which were fed with 0.3 mg/kg of organic selenium were significantly higher (p>0.05) in comparison to the same parameters of pheasants of the control K group. The pheasants of II group also had better sensory traits of meat and they achieved the highest difference of the sum of the ranks of the meat acceptability.  The difference was by 15 points higher than in the control K group and 7 points higher than in meat of the pheasants I group fed with 0.2 mg/kg of selenium. Adding of organic selenium in the food of  II group pheasants (0.3 mg/kg) had a positive effect on increasing the water retention capacity in breast meat by 0.75% compared to the control group, namely by 0.58% in comparison to I group. Average values of chemical parameters of meat (pH, water, fat, proteins and ash content), haematological parameters of pheasants blood  (number of erythrocytes, leucocytes and platelets, haemoglobin and haematocrit values) and biochemical parameters of blood serum ( glucose, enzymes AST and  ALT), total protein concentration, total cholesterol albumin, triglycerides, Ca, K and Na) were within the limits of reference values for pheasants and very uniform values without significant differences among examined groups.