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
Concerns over Chronic Wasting Disease are fueling a long-standing legal battle between Minnesota regulators and deer farmers. The case could soon reach the state’s Supreme Court with broader implications for agriculture.
The National Cattlemen’s Beef Association (NCBA) and Public Lands Council (PLC) are praising the passage of a bill to delist gray wolves as an endangered species by the U.S. House last week.
Recent USDA export sales data show China has been active in the U.S. market, but analysts tell RFD-TV News that the timing is a key clue.
USDA Undersecretary Luke Lindberg told RFD-TV News that we can only guess what Congress will do down the road. Still, the USDA recognizes its responsibility to spend resources efficiently and effectively.
In Minnesota, a legal and legislative battle has reached a tipping point. For over a decade, the state’s Department of Natural Resources (DNR) and the private deer-farming industry have been locked in a dispute over the management of Chronic Wasting Disease (CWD).
Tight feeder supplies and lower placements indicate continued support for the cattle market, with regional impacts heightened in Texas by reduced feeder imports.

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.

LATEST STORIES BY THIS AUTHOR:

Bankruptcy filings reflect prolonged margin pressure, rising debt, and limited financial flexibility across farm country. Bigger operating loans are helping farms manage costs, but they also signal growing reliance on borrowed capital.
USDA’s February WASDE report, analysts expect minimal price movement as grain stocks remain steady. Traders weigh renewed Chinese soybean purchases, South American weather, acreage shifts, and upcoming USMCA trade talks.
RFD NEWS Correspondent Frank McCaffrey was in Mission, Texas, where state and federal officials addressed growers and producers at a round table event hosted at a citrus grower’s facility. He shows us how welcome news was all around.
Nationwide highlights expanded insurance options for cattle operations and their company initiatives to promote grain bin safety and support women in agriculture.
New Holland VP Ryan Schaefer shares insights into the brand’s legacy and innovations that support U.S. cattle producers.
Corey Owens of the San Angelo Stock Show and Rodeo Association shares updates about this year’s event and its continued impact on youth, agriculture, and the San Angelo community.
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!
Enjoy traditional country music from modern-day troubadours The Malpass Brothers. Each episode stars the brother duo of Chris & Taylor Malpass along with a featured celebrity guest– and loads of clever humor.
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.