Tall fescue is a resilient forage source found in nearly 40 million acres of grazed pastures in the U.S. With nearly 17 million beef cows on tall fescue grasses annually, this common forage source also comes with a common issue: fescue toxicity.

Cattle consuming endophyte-infected tall fescue are negatively impacted by heat stress caused through constriction of the blood vessels. Numerous symptoms are displayed by cattle in efforts to cool themselves, none of which include cattle performing their best.