Is Your Horse Showing Signs of EHV? An Equine Expert Explains Next Steps to Take

A leading Oklahoma veterinarian explains common symptoms of Equine Herpes Virus (EHV) and warns owners to remain vigilant because it can spread quickly among horses.

WEATHERFORD, Oklah. (RFD-TV) — An ongoing Equine Herpes Virus (EHV) outbreak was recently detected following a rodeo event in Waco, Texas — it is raising concerns for horse owners across the South, but especially in nearby states.

A leading Oklahoma veterinarian is speaking out on the disease’s origin, warning the virus can spread quickly and that owners need to remain vigilant.

“EHV is a virus, a herpes virus, to be exact, in horses,” explains Dr. Jason Thorne, DVM, and the owner of Territory Medicine in Weatherford, Okla. “The good thing, for starters, is that it doesn’t affect humans -- but we can carry it, however. So, the herpes virus comes in two very distinct serovars, Type I and Type IV. There are other types, but in our population, really, it’s just I and IV causing problems. I believe what happened in Waco was going to be an EHV I, and that typically starts out as a predominantly respiratory infection, you know, notable to all of us, as far as a coughing horse or something like that, and that virus was probably shed by a horse that harbored it.”

With cases appearing across the region, Thorne said the most important step for owners is to act quickly if they suspect their horse is getting sick. Key signs of EHV include respiratory symptoms and fever.

“If you’re thinking your horse is looking like it might be sick or getting suspicious, then get yourself a digital thermometer,” he said. “Take a temperature at home, because, you know, we want you to stay home. We don’t want you to have to haul anywhere if you can help it. But get a temperature, then double-check it, and if it is over 101.5, get on the horn with your veterinarian and describe what you’re seeing and where you’ve been. What some people seem to forget with the rush of an outbreak is, wait a minute, where have I been? And not necessarily my horse, but where have I been with other horses and came home?”

Thorne urged owners to watch their horses closely and report any signs of illness immediately. As a precaution, many organizations are canceling events, urging owners to stop hauling, and implementing quarantine measures. Experts said vaccination remains one of the best tools to prevent EVH infections.

Related Stories
The five-day auction drew up to 6,000 people and saw steady prices throughout the event
Sponsored
Like a lot of things, the more you fall in love with a hobby, the more you realize how much you don’t know. Backyard Smart answers the lawn-and-garden questions homeowners are looking for.
Longview FFA gives students practical experience from meat processing to floral design in their unique curriculum.
Son of a South Dakota Rancher, Kolt Mendenhall is turning his lifelong passion for riding into a collegiate career, committing to Southeastern Oklahoma State University next fall, bringing years of ranch experience to the collegiate arena.
Rodeo Austin exhibitor Kash Morrison reflects on how FFA taught him the importance of hard work and time management while competing in livestock shows during the school year.
At the White House’s “Celebration of Agriculture,” the Trump Administration announced a slate of policies to support farmers and ranchers, including biofuel mandates, SBA loan programs, and new labeling policies to boost domestic markets for ag products.

Marion is a digital content manager for RFD News and FarmHER + RanchHER. She started working for Rural Media Group in May 2022, bringing a decade of digital experience in broadcast media and some cooking experience to the team.
Rural Lifestyle & Entertainment Shows
Twisted Skillet brings a straightforward, hands-on approach to kitchen television, rooted in food and fire. Hosted by Texas chef Sean Koehler, the series explores open-fire outdoor cooking techniques, regional ingredients, and the people who raise, prepare, and inspire the food found across America.
Brought to you by Gus Arrendale & Springer Mountain Farms, join dynamic bluegrass duo Dailey & Vincent as they welcome scores of fabulous bluegrass, country, and gospel music acts as special guests. Loads of laughs, your favorite guests galore, and lots of good times are guaranteed. Don’t miss all the fun!
Join popular polka performer Mollie Busta as she hosts the weekly “Mollie B Polka Party” on RFD Network! The one-hour program features the nation’s top polka bands and a wide variety of ethnic styles, recorded on location at music festivals across the country.
FarmHER + RanchHER on RFD-TV is working to change how people perceive a farmer by sharing the stories of the women who live and lead in agriculture.
The affable and unassuming international singing star Daniel O’Donnell is one of Ireland’s best known performers – from Australia to Alaska.