Researchers from Ludwig-Maximilians-University in Munich, Germany studied possible causes of the formation of fecal liquid in otherwise healthy horses. Fecal liquid (or fecal water, as the researchers denote it) is not diarrhea. Instead, horses afflicted with this condition have normally formed fecal balls, followed by excretion of water from the anus. Not only does this soil the tail and legs, but the excretion causes skin irritation and lesions. Fecal liquid production is not only unpleasant; it also deprives the horse of important minerals and electrolytes.