Summary
Dietary omega-3 fatty acids are a type of polyunsaturated fat known to improve production and body health in animals and human as well. The current on-farm trial was to evaluate the effects of omega-3 fatty acids inclusion in the diets on milk production and fatty acid profiles and insulin growth factors-1 values in lactating dairy cattle. Three hundred Holstein lactating cows in a commercial farm were assorted to a control group fed basal control diet and two treated groups fed diets containing extruded flaxseed (7.0%) and salmate (25 g/head/day). The basal control, extruded flaxseed and salmate diets were formulated to be isonitrogenous and isoenergetic diets. The diets were given to each group from three weeks pre-parturition to week 23 of lactation. Feed intake, milk production and com
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