Changing Herd Dynamics

When a horse changes herds, behaviors and pecking order can change, too.

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As a horse owner, you know if your horse is the boss or at the bottom of the pecking order when he interacts with a herd. But keep in mind that herd dynamics — and therefore your horse’s place in the herd — can change. Just because he was the leader in one situation doesn’t mean he’ll act the same within all herds at all locations. If you find your horse acting differently at a new barn, his past and present herd interactions may be the key to understanding his behavior.

Here, we’ll talk to equine behavior experts to find out how and why horses change ranks with changing herd dynamics—and how those changes may impact overall wellbeing and behavior. Your horse’s position in the herd may affect his overall disposition and interactions with you. We’ll also provide tips to help your horse transition to new settings.

Rethinking Herd Dynamics and Hierarchy

“We traditionally thought that social hierarchies were linear,” says Suzanne Millman, Ph.D., who teaches animal welfare and behavior courses at Iowa State University. “We thought there was an alpha down to an omega. We now know that it’s more complex than that. In a larger group of horses, a singular horse may be really attached to one horse more than another. If a pony was attached to a lead mare, the pony’s rank may be higher than if he

Two Paint Horses displaying herd dynamics
Horses may become much more attached in a herd of two than in a larger herd. Photo by Clix/Shawn Hamilton

were on his own.”

If your horse seems suddenly different in a new location, consider what may feel different for him in the new surroundings.

“Even though a horse may have been subordinate in the groups he was in at his old barn, it may be that in a new barn, he acts like top dog and bullies the other horses,” Millman says. “The context matters. It’s not always predictable.”

What factors may influence behavior and herd dynamics at a new locale? Millman says the size of the herd can make a difference. While it’s important for horses to have companionship of other horses, having only one or two herdmates limits the horse’s ability to choose his own social groups.

“There can be an over-attachment if there are just two horses,” Millman explains. “That can make a horse more reactive if he is taken out alone. Horses form very close social bonds. Having a larger group to spread his attachments around means that when he’s separated from one of the individuals, he’s not going to panic to the same extent.”

Millman explains the dynamics of how horses form clusters, or “friend groups,” within a larger herd. Clusters remain in place for decades when horses enter a herd together. Many geldings prefer to be with other geldings. Mares may choose to associate with other mares. Research with Mustang herds also shows that horses tend to form clusters with horses who have the same coat colors as their dam.

Being removed from a bonded pair and taken to a new location could affect a horse’s behavior. The loss of a high-ranking pal could also affect a horse’s position and rank.

Settling In

Whether you get a new horse who acts differently in a new location or you move to a barn with a totally different turnout routine, it may take time (usually two weeks, but sometimes up to a month) for your horse to settle in. Plan for your horse’s introduction time—and plan to spend as much time as possible with your horse in the new setting.

“Whenever you’re putting an animal into a new environment, it’s going to be stressful,” Millman says.

You may ease the transition by talking to the barn manager. Find out how new horses are introduced and what groups will be there. A good barn manager will get to know horses and recognize who will be safest to meet first.

Keep in mind that the lowest-ranking horses may not be the best for your horse to meet first—they may be the horses who are competing for resources and may act out. The best horses to meet first may be those in the middle of the herd rankings.

It’s also advisable to introduce a horse to a herd slowly, such as putting him in a smaller pen at first with one or two buddies, so they can work out a pecking order in a smaller group. Then put him and those horses in with a bigger group once there is harmony.

Millman suggests being with your horse to see how he’s responding in his new environment. Know that if you watch your horse’s introduction to the herd, there will be bites and kick threats. She says most horses will work it out safely if there are ample resources. Make sure there are multiple hay locations so that if your horse is moved away from one, he’ll be able to find another.

Herd dynamics are displayed between two horses over hay
Most pasture herd situations will work themselves out as long as there are enough hay piles so that horses who don’t get along can move apart. Photo by Aleksandra Saveljeva/Shutterstock

When you’re alone with your horse, you can help bolster confidence in the new place.

“Predictability is the key,” Millman says. “Groom your horse and do lots of hand-walks. It’s all about the little obedience things that you do daily. You want your horse to have confidence and know what to expect.”

When you do start training, go easy.

“Go back to something that your horse really knows well,” says Millman. “He has to learn that in this environment, the skill still applies.”

Training for Resiliency

Emma Kjelson is a horse behavior consultant certified with the International Association of Animal Behavior Consultants. She guides horse owners through transitions and focuses on helping horses feel calm so that they can learn in their new herds and homes.

Kjelson notes that not all horses take as much time as others to get used to new surroundings or the dynamics of a new herd.

“Horses who have had a good training program—one that includes generalizing behaviors to new environments—will acclimate faster,” she says. “We have to help horses with their fears of new places. When they’re young, we want to take them to new environments with as low of stress as possible. We want to build up resiliency. We want to generalize our horses’ experience to all new places and things.”

Horses in a stable
Find out as much as you can about your horse’s history and the type of group environment he may be used to. Photo by Stokkete/Shutterstock

Find out as much as you can about your horse’s past. Where has he been? What types of horse groups has he been with? What type of barn or care setting did he live in? The more knowledge you have about your horse’s past, the more you can help him transition to a new place.

Change of Pace

However, the past isn’t always a predictor of the future. Tweaking the setting and providing consistent contact can help.

A horse and pony in a field together
Going from a fully stalled environment to a field can cause stress; choosing just one herd companion can help ease the transition. Photo by Mariait/Shutterstock

Kjelson shares a story about a horse she helped and what it took to help the horse feel safe in the new setting. The shift from a fast-paced training barn to a pasture board setting with only one other horse caused the new horse to act differently than expected.

“A week and a half after she moved him, the horse was still pacing the fence lines,” she says. “He was super stressed. This horse was used to being with a ton of other horses in a stall environment. He was put in a pasture with just one Miniature Horse. It was a big change.”

What Helped?

“I had them put an acrylic mirror on the barn so that he could see more ‘horses,’” Kjelson says. “We also put him on a milk protein supplement that helps to relax your horse. He went from calling, losing weight, and pacing to engaging with the other horse in about a month.”

If you plan ahead and provide positive experiences in the new location, your horse should settle into the new herd and home in no time.

This article about herd dynamics appeared in the March 2022 issue of Horse Illustrated magazine. Click here to subscribe!

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Heidi Nyland Melocco holds a Bachelor's degree in English from Ohio Wesleyan University and a Master's degree in journalism from the E.W. Scripps School of Journalism at Ohio University with a concentration in magazine and photo editing. At the latter, she was named Master's Student of the Year. Her stories and photographs are seen regularly in many equine publications, including Horse Illustrated and Young Rider. Melocco is an author of Western Horseman's Understanding Lameness, Western Horseman’s Legends 6 and 9, and Goodnight’s Guide to Great Horsemanship, and she’s a contributing photographer for the Certified Horsemanship Association's Instructor Manual, Hitch Up & Go, The Revolution in Horsemanship by Rick Lamb and Robert Miller, DVM; and Breed for Success by Rene Riley and Honi Roberts. She and her daughter are currently writing a new children's book called Pony Powers—all about what it's like to keep a pony at home. Melocco's photos have won awards from the Equine Photographer's Network and an AIM Award. Melocco holds first-prize awards from American Horse Publications (AHP) for training stories and equine photography. She has had more than 35 magazine cover photos. Melocco continues to write about and photograph horses and also works in video broadcasting. She directed and produced a popular RFD-TV show for more than 10 years. Melocco stays up to speed with social media and has grown accounts to reach and engage with hundreds of thousands of fans. She served on the Board of Directors for the Colorado Horse Council and has presented social media seminars at the PATHi and CHA International Conferences.She started riding Ponies of the Americas at age 5 at Smiley R Ranch in Hilliard, Ohio, with Janet Hedman and the W. E. Richardson family. In college, she was president and later assistant coach of the Ohio Wesleyan University Equestrian Team, coached by world-champion-earning trainer Terry Myers. Keeping active as a rider and riding instructor, Melocco began studying Brain Gym—an international program based on whole-brain and active learning. As a 4-H advisor, she used the simple movements to help horseback riding students relax and achieve their goals in the saddle. Melocco became a registered instructor with Path International, helping to combine horse knowledge and therapeutic experience with horsemanship training. Melocco has presented demos at Equine Affaire and at the Path International and National Youth Horse Council Annual Conferences. She taught at the Colorado Therapeutic Riding Center in Longmont, Colo. Melocco resides on her small-acreage horse property with her husband, Jared; daughter Savannah; AQHA gelding, Golden H Mister T; pony, Romeo; dogs Lucy and Rosie, and three orange barn kitties known as the "Porch Patrol."

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