Which grass is not typically recommended as a pasture for horses?

Fescue can be problematic as a pasture for horses due to the potential for toxicity associated with certain strains of the plant. Specifically, endophyte-infected fescue contains a fungus that produces toxins which can lead to serious health issues in horses, including reproductive problems and reduced weight gain. Mares grazing on infected fescue can experience prolonged gestation, low milk production, and even difficult births.

While Kentucky bluegrass, Timothy grass, and Orchard grass are generally considered good forage options for horses, providing adequate nutrition and fewer health risks, fescue is best handled with caution, particularly when it involves pregnant mares. This difference underscores why fescue is not typically recommended as a pasture choice for horses.