If you haven't heard, there has been an outbreak of Vesicular Stomatitis in several Texas Counties. VS can affect horses, livestock, wildlife and even humans. This acute disease causes lesions to develop on the tongue, mouth lining, nose and lips. Some lesions may occur on the coronary bands, sheath or udder. One of the more obvious signs is drooling or frothing of the mouth post rupture of the lesion and weight-loss as eating may be excessively painful. VS usually persists for a near of two weeks but it may take as long as two months for the lesions to completely heal.