In Australia ‘cranky cows’ are often assumed to be cranky because of heat, dogs, or other external factors irritating the cows. In fact the irritation comes from toxins produced by rye grass endophyte. Cranky cow syndrome is said to cause staggers, heat stress and reduce milk production. There is no known way to end problems with the rye grass toxins, but a new microtoxin binder has been able to reduce the effects.