Well here is a reference to an article that describes increasing omega 3 in cattle through flaxseed and improving their health and reducing the need for antibiotics.
That's what has Jim Drouillard, a professor of animal sciences and industry at Kansas State University, wondering whether flax might be good for beef cattle. In a series of experiments over the past 10 years, he found that feeding flaxseed to cattle in the five months before slaughter reduced inflammation and the need for antibiotics, and offset some of the negative effects of a corn-based diet. It also had an unexpected benefit for consumers.