Blister Beetle Tip
Some insects found in alfalfa can cause a major problem for the horses that consume them inadvertently. Blister beetles are long, thin and brown or black striped insects. They are rare but are associated with serious consequences if the dead beetles are consumed. (Blister beetles contain a potent irritant that can damage the stomach and urinary system.) Hundreds of beetles can sometimes be found in a single flake of hay.