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
Pennsylvania Secretary of Agriculture Russell Redding discusses the recent surge in bird flu cases, the state’s expanded biosecurity response and efforts to support poultry producers.
The San Antonio Stock Show and Rodeo concluded last night, marking the end of another successful year showcasing youth exhibitors, livestock producers, and the spirit of agriculture.
Farmer and retired colonial Joe Ricker joined us to highlight Ag Safety Awareness Program Week, share his work supporting veterans and farmers, and offer guidance on making safety a year-round priority on the farm.
Restored base acres strengthen cotton risk protection.
National FFA Southern Region Vice President T. Wayne William talks about Wear Blue Day, the history of the blue jacket, and why the tradition continues to inspire pride and connection among FFA members nationwide.
The closure of Lubbock Feeders highlights mounting pressure on the U.S. cattle supply, according to the Texas Cattle Feeders Association, as border restrictions and costs strain feedyards.

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:

Weak crop margins and tariff uncertainty are delaying machinery purchases and signaling slower capital investment across U.S. agriculture.
Farm Bureau Economist Dr. Faith Parum explains the role farm safety net programs play in supporting farm finances as growers head into the 2026 planting season.
Wed, 3/18/26 – 7:30 PM ET – Build better financial habits with tips from AARP
Corn demand is rising thanks to ethanol expansion, yet year-round E15 remains missing from the Farm Bill—leaving farmers questioning the policy gap.
Real Ag’s Shaun Haney explains how farmers are approaching risk management and the steps they’re taking to strengthen profitability through better financial planning.
Valley Irrigation’s Darren Siekman explains the advantages of their new pivots for growers managing acreages of up to 60 acres.
Rural Lifestyle & Entertainment Shows
The affable and unassuming international singing star Daniel O’Donnell is one of Ireland’s best known performers – from Australia to Alaska.
Bill Gaither, the founder of one of gospel’s most successful groups, the Gaither Vocal Band, and his wife, Gloria, are delighted to showcase their favorite gospel music during “Gaither Gospel Hour” on RFD-TV.
RFD+ EXCLUSIVE | This hour-long show explores the trains and locomotives that aided the growth of travel, further settlement, and the development of a variety of American industries and agricultural ventures.
Ray’s Roadhouse is a weekly program featuring the music of Ray Benson and Asleep at the Wheel. Ray and his band Asleep at the Wheel has had a more than 50 year career in the music industry and over the years have earned nine Grammy Awards. The program also will feature guest performers such as Pat Green, Stoney LaRue and Kelly Willis.
Analiese Gregory is taking one of the biggest risks of her life: she’s left her successful career as a restaurant chef and bought a century-old cottage at the bottom of the world, in pristine Tasmania, Australia. We share her journey of discovery as she gets under the skin of her new home – and learns to live seasonally off the land, by hunting, fishing, and foraging.