Grape marc proves worth in SA

GARY, Ros and Justin Zweck, Blyth, South Australia, heard about grape marc as a feed supplement and were interested in its potential for their dairy herd’s feeding strategy. Grape marc is a by-product of winemaking with a high concentration of fat and tannins. Crimped marc is steam-distilled grape marc that has been screened to remove stalks then rolled to crush the seeds, improving digestibility and energy availability.