Animal health officials say that the Vesicular Stomatitis (VS) outbreak in Texas appears to be winding down as of mid-August, but more than 150 infected animals have been detected in Texas, New Mexico and Colorado and more cases may be seen before the outbreak is over. VS is a viral disease that appears every few years. Infected livestock, such as horses, cattle, goats, deer, swine or other susceptible animals, develop blisters, ulcers, or sloughing of the skin in and around the mouth, teats or hooves.