As a result, there have been increasing calls—including from the Association of American Feed Control Officers—for CBD’s by-product, spent hemp biomass, to be investigated as a potential animal feed ingredient. Is this plentiful fiber source a reliable, healthy new feedstuff for livestock, including dairy cows? Their new study—the first of its kind using biomass left over following extraction of CBD—demonstrates that spent hemp biomass is a safe, if somewhat unpalatable, feed ingredient to include in the diets of lactating dairy cows. Given that the US Food and Drug Administration has yet to approve feeding hemp, or any of its by-products, to livestock, why do we care about spent hemp biomass as a potential food source? The team are eager to explore the follow-up questions from their research, including the possibility that dairy cows could adapt to eating spent hemp biomass over time, and exploring whether feeding spent hemp biomass could prime dairy cows for higher efficiency.