O MEGA-3 fatty acids are reported to play an important role for healthy cell membranes, which are necessary for both human and animal health. The aim of this study was to study the role of supplementation of omega-3 in rations of ewes exposed to cold stress during the three winter months on productive performance of ewes. Adding 35ml of omega-3 to Awassi ewes ration led to increasing weight gain during the months of January and February (10-12•C). At the same time that feed intake rates reached their lowest levels in ewes who dosed 35 ml of Omega in the three months of the study, feed conversion ratio for those ewes improved. All physiological traits represented like body temperature, heart and breath rate stabilized and significantly improved in cold-stressed sheep, especially in those that were add 35 ml of omega-3. All physiological biomarkers corresponded to a clear improvement in the levels of Thyroid-Stimulating Hormone (TSH) and Thyroxin (T4) and in both 25 and 35Omega3 treatment groups, which, in turn, outperformed the control group. It can be concluded that adding omega3 to ewes ration improved productive and physiological traits.

The study was conducted in the animal barn of the Agricultural Research Department/ Nineveh Research Department / Ministry of Agriculture during the period of 1/3-15/4/ 2022, using 18 Awassi ewes in the last stage of milk production (after weaning). The ages of the ewes ranged between 3-4 years and their average weight (46.80 ± 1.33 kg) The ewes were divided into three groups. The first group considered control (T1) and was fed on the standard ration without addition, the second group (T2) was fed on the standard ration with the addition of 10 glacial acetic acid (99.85%) food grade for each ewe, the acid was added to the feed after diluting it with tab water in a ratio of (1:1), while the third group (T3) was fed on the standard ration and acid with the addition of 0.4 gram of selenium-vitamin E. Results were showed no effect of additives in body weight while, the response was clear in enhancing milk production significantly with selenium vitamin E addition. Milk components as percentage and yield were close between T1 and T2 with except solid non-fat that decreased (p≤0.05) in T2 8.76% as compared T1 9.18%. on other hand all milk components significantly higher in T3 as compared t1 and T2. Serum triglycerides, cholesterol, and LDL were higher (p≤0.05) in T3 as compared T1.

Background: Milk production is one of the most important goals pursued by breeders of milk-producing farm animals World Wide. Goats are one of the most important of these animals. This study sought to compare the effect of Saccharomyces cerevisiae yeast (SCY) with or without Selenium and zinc on milk yield and milk nutritional composition and hormones related. Methods: Twenty four female Shami goats distributed into 4 equal groups (6 goats /group) control group (C) animals fed on standard concentrated diet without adding, T2(SCY) animal dosed with S.Cerevisiae at a concentration of 0.2 g/kg of body weight, T3 (Se + Zn) was fed on Selenium and zinc at a concentration of 0.3 and 0.2 g/kg of body weight, respectively, T4 (SCY+Sc +Zn) was represented by dosing their animals with an S.Cerevisiae 0.2g/kg body weight with selenium and zinc added to ratio at same as T3. Result: there was a significant increase (P≤0.05) in the in-milk production, solid-to-fat ratio, milk density and protein level at (SCY+ Sc+Zn) among the transactions, also (SCY+ Sc+ Zn) highlighted a significant increase (P≤0.05) in prolactin, thyroxine and cortisol hormones accompanied by a significant decrease (P≤0.05) in estrogen and triiodothyronine levels in compared to all treated groups.

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