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
Nebraska’s largest wildfire on-record has burned 650,000 acres, with three other major fires also burning across the state, destroying pastureland and threatening cattle.
NCBA President Colin Woodall states that misinformation like this is damaging to cattle producers, the beef supply chain, and consumer confidence
Held each year in Mercedes, the Rio Grande Valley Livestock Show remains a cornerstone event for the region — blending education, competition, and community, even during challenging times for agriculture.
For producers, the cost of doing business is no longer determined solely by feed, fuel, and weather—it is increasingly a matter of navigating the differing legal philosophies of every state line they cross.

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:

NCGA Chief Economist Krista Swanson discusses the evolving role of ethanol in the current energy crisis, opportunities for expanding corn discusses the evolving role of ethanol in the current marketdemand, and the industry’s outlook moving forward.
Ag Secretary Brooke Rollins surveys Nebraska wildfire damage as cattle losses, tight supplies, rising imports, and beef industry investigations impact U.S. markets. Roger McEowen outlines legal and tax considerations for ranchers recovering from wildfire damage.
Texas Agriculture Commissioner Sid Miller launches Agricultural Defense Program to combat pests, disease, and predators threatening farmers and ranchers statewide.
USDA Cattle-on-Feed report for March shows slightly lower inventory and higher February placements, signaling a tighter supply but steady outlook for the U.S. cattle herd.
Nebraska Cattle Rancher Joe Van Newkirk shares his firsthand insight on devastating wildfires in the Sandhills, discusses challenges facing ranchers, long-term calf health concerns, and the recovery efforts underway.
Nebraska Cattlemen’s Association President Craig Uden shares the latest on Nebraska wildfire conditions, discusses challenges facing producers, and outlines relief efforts underway.
Rural Lifestyle & Entertainment Shows
Opry Live is the premier weekly broadcast and livestream of the Grand Ole Opry, featuring country music superstars, legends, and rising talent performing on stage in Nashville.
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.
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.
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.