The question remains whether it is worth applying oil additives during summer
feeding of cows. As an effect of our experiments it becomes evident that in summer,
during the period of feeding fresh green forage, good results regarding milk fatty acid
composition can still be improved by supplementing the diet with fish and rapeseed
oils. However, such approach will only be justified if there is a niche on the market
and a demand for special products of high functional usefulness increases. There are
signs indicating that this perspective may be realized in near future