ScienceDaily: The benefits to animals of omega 3 fatty acids in fish oils have been well documented — helping the heart and circulatory system, improving meat quality and reducing methane emissions. These last two benefits may only apply to cows but lowering emissions is important for the environment, as methane given off by farm animals is a major contribution to greenhouse gas levels. Researchers from University College Dublin reported that by including 2% fish oil in the diet of cattle, they …