Equine
Lameness Examination in the Horse
Lameness is one of the most common problems that occur in the horse and that owners will have to address. Many owners have experienced lameness and the examination process, but there are various ways to approach the lameness examination procedure. There are also new advanced diagnostic tools to help identify the limb or limbs that are causing the lameness and allow objective quantification of improvement when the region of the limb in questions is isolated to the source of pain.
Basic Lameness Evaluation
Veterinarians commonly have to rely on the owner, trainer or the rider’s information and history about the horse to help narrow down the cause of the lameness. Therefore, an accurate history about the horses’ age, career, level of work, previous treatments, abnormal things that the horse is doing under saddle or refusing to do while working are all important information that is gathered before the exam begins. This information can be the key to understanding or honing in on the cause of the lameness. In some cases, the cause of poor performance, refusing to work as hard, or refusing certain tasks can be unrelated to a musculoskeletal injury.
Physical examination of the horse is generally a good starting point before the horse is put through the lameness examination. Palpation of the limbs, ligaments, tendons and joints can give clues to potential problem areas that can be leading to horses’ lameness issues. Palpation of the neck, back and sacral regions can give clues if the horse is muscle sore, back sore and/or has old injuries that can lead to soundness issues. Hoof testers are an important part to a complete physical examination because of the propensity of forelimb lameness to arise from the feet. Lastly, visual examination for conformation, shoeing or trimming methods and comparison of musculoskeletal symmetry of the horse are all part of a complete examination.
The initial lameness examination is typically completed while trotting the horse in hand in a doctor preferred pattern over a hard or firm surface to evaluate the horses’ movement. This portion of the exam in typically referred to as a baseline evaluation before flexions are performed. A grading system is used set by the American Association of Equine Practitioners (AAEP) to have a standardized method to grade degrees of lameness. The system is a 0-5 scale and has a defined criterion that the horse has to meet in order to be selected for a grade. Then specific areas of the limbs are isolated and stressed by performing flexion tests. This is a technique to induce temporary stress on the joint(s) to discern if pain is arising from that particular joint(s) or area of the limb and the degree of response to the flexion is noted. Some veterinarians grade the response numerically or by a verbal descriptor scale, for example, mild, moderate or severe.
More difficult or less obvious lameness cases require putting the horse under different circumstances to exacerbate the lameness. Other circumstances the horse can be put under to achieve this are lunging the horse, riding the horse under saddle or having a rider perform the specific gait or movements that the horse is exhibiting lameness under or poor performance.
Diagnostic Nerve and Joint Blocks
Just because a limb has been found to be the source of lameness doesn’t mean much unless the specific cause can be diagnosed. Diagnostic nerve blocks are used routinely in equine lameness examines to further narrow down the area since horses can’t tell us where the pain is coming from. Therefore, after blocking the horse one zone at a time the horse will show improvement once the site the pain is arising from is blocked out. Diagnostic blocks can be performed by injection local anesthetic drugs perinueral (adjacent to specific nerves) to block pain sensation or sterilely into a joint to desensitize the joint. Once the anesthetic drug is injected around the nerves or into the joint it only takes minutes to block the pain sensation from that region allowing repeat examination of the horse to see if the source of lameness has been identified.
Lameness Locator
Lameness has long been a subjective measure of a horses’ gait that can have its pitfalls. If you want to test this theory, just try to get a group of people to agree on where a horse is lame, and you will quickly find out it is difficult to get everyone to be on the same page. Luckily there are ways now to objectively quantify a horse’s gait/lameness with a system developed by veterinarians and engineers to give real data about how a horse moves. The system can pick out which leg is lame and also indicate if there is an improvement in the lameness after diagnostic anesthesia is performed. This can be all done simply with a tablet in the veterinarians hand and inertia sensors placed on the horse. The sensors collect the information as the horse is being trotted in hand or with a rider on the horse. The information is sent wirelessly to the tablet and the software calculates and grafts the information in real time.
Read more in the January issue of Oklahoma Farm & Ranch.
Equine
Trailer Safety Checklist
By Janis Blackwell
As the season arrives to gear up for participation in your equine event of choice, one thing remains a constant for all horse owners. That constant is our responsibility to insure the safety of our horses by being diligent to maintain the integrity of the trailers in which we haul them. There are a number of things that can be dangerous both inside and outside of your trailer. Whether you traveled all winter long or whether your trailer sat unused or was used very little through the cold weather months, at least once a year your trailer is due a thorough going over. So here we go with a checklist that will help you insure a happy and safe trip for you and your equine partner.
- A sound floor is absolutely imperative. Whether your floor is aluminum, steel or wood, it should be cleaned regularly after use to preserve it. Urine and manure will erode and weaken all types of floors. Even rubber mats will not prevent erosion of your floor. (Maintenance tip: remove mats and wash aluminum floors often to prevent erosion.)
- Especially check wooden floors for rotten boards. Immediately replace questionable flooring before hauling. (Maintenance tip: For wood, remove mats and wash out manure and debris. Coat wooden floor in a cheap motor oil. Allow to sit in hot summer weather until the oil soaks in. Be careful—floor will be slippery until oil cures into the wood. This treatment yearly will preserve a wooden floor for much longer than normal as it repels urine and protects the wood).
- Keep the interior and exterior washed to enable you to check for rusted out places, leaks, etc.
- Have a professional check your brakes at least once yearly to be sure they are operating properly.
- Be sure tires are inflated to the proper air pressure, and check the inside of each tire for hidden unusual wear that could cause a blowout. Replace worn tires before leaving home.
- Wheel bearings must be checked and packed at least once a year. This should be done even if the trailer has been rarely used since the last time the wheel bearings were packed. In fact, trailer maintenance professionals say that sitting stationary and unused is even worse for the bearings. Improper care and maintenance of wheel bearings can cause a wheel to seize up and actually twist off while in use. Use a horse trailer professional for this maintenance task.
- Axles should be checked for bowing. A bent or bowed axle can cause excessive tire wear and damage wheel bearings.
- There should be no more than two inches in height difference from the front of the trailer to the back. More difference than that causes the bulk of weight of the trailer and its contents to ride mostly on the rear axle causing it to bow and wear on both tires and wheel bearings.
- Another critical part of the trailer to keep an eye on are the butt chain or bar and the back door. The butt chain or bar should be firmly attached to the wall and its keeper and should always be latched. The door should have a strong secure latch with a pin to insure it stays latched while in motion.
- Finally, but certainly not of least importance is a thorough check of the trailer hitch including ball and coupling. Keep the ball well greased. Periodically, check to see that the ball is still securely tightened and the latch on the coupling is working properly.
These few critical safety check points can save you money, stress and the wellbeing of your horse. Until next time, happy trails and safe traveling.
This article was originally published in the April 2016 issue of Oklahoma Farm & Ranch.
Equine
Fly Control That Works: What’s Worth Your Money This Summer
By Ann Asher
Every year about this time, it feels like the flies start winning. No matter how clean I keep the pens or how many fly strips I hang, they show up in clouds. Over the past few summers, I’ve tried just about everything—feed-through supplements, predator bugs, DIY traps, and plenty of fly sprays. Some things helped. Some were a waste of money. If you’re battling flies this year, here’s what’s actually worked for me—and what research says can make a real difference on the farm or ranch.
Start with Cleanliness (But Know It’s Not Enough)
The first—and most repeated—advice is to stay ahead of the mess. Manure management is critical, especially around barns, pens, and loafing sheds. Flies lay eggs in fresh manure, and those eggs hatch into larvae in as little as 24 hours during warm weather.
I try to clean high-traffic areas at least every other day, but the truth is, even on the cleanest farms, flies can still be a problem because of moisture, standing water, and nearby neighbors.
Feed-Through Fly Control: A Solid Foundation
One thing that made a noticeable difference for my horses and cattle was starting a feed-through larvicide early in the season. These products add a growth regulator to the feed that passes through the animal and prevents fly larvae from developing in manure.
It’s not an instant fix—you won’t see fewer flies for several weeks—but once it kicks in, you’ll notice fewer new flies being born.
Tip: Feed-through products only work if all animals on the property are eating it consistently. Otherwise, you’re just treating part of the manure, and flies will keep breeding.
Fly Predators: Small, Mighty, and Surprisingly Effective
Last year, I tried fly predators for the first time. These are tiny, non-stinging insects that lay their eggs in fly pupae, stopping the next generation.
I was skeptical (and honestly a little creeped out at first), but I noticed that where I used predators around the barn and dry lots, the fly pressure dropped. Some companies even offer subscription services that send predators timed to your local climate.
Tip: Fly predators don’t kill adult flies—they stop future flies. So you still need to control the adults already buzzing around.
Good Old-Fashioned Fly Traps
In areas like the barn aisle and outdoor runs, nothing beats physical traps.
I like a combination approach:
- Sticky ribbons and strips for indoor areas
- Odor-baited traps placed away from livestock areas to draw flies away
Tip: Hang baited traps a good distance from barns or stalls. Otherwise, you’re luring flies right into your animals’ space.
Fly Sprays: Choose Carefully
Fly sprays are the first thing most of us reach for—and they do help—but they have limits.
For horses, sprays containing pyrethrins, pyrethroids (like permethrin), or natural oils tend to offer the best repellency. Even then, most sprays only last a few hours, especially if animals are sweating heavily.
Tip: Apply before morning turnout and again before evening if possible. Reapplication is important, especially after heavy exercise or rain.
Other Tools That Help
- Fly masks and fly sheets — particularly those with UV protection, to protect sensitive areas like the eyes and ears
- Fans in barns and run-in sheds — flies struggle to land in strong airflow
- Automatic sprayer systems — an investment, but highly effective for larger barns
The bad news? There’s no magic bullet for fly control.
The good news? Combining several methods—manure management, feed-through treatments, predators, traps, and targeted sprays—can actually make summer bearable for you and your livestock.
At the end of the day, I figure if I can cut the fly population by half, I’ve already made life better for my animals—and a lot less miserable for myself.
References:
- Texas A&M AgriLife Extension – Managing Flies on Livestock
- University of Kentucky Entomology – Controlling Flies Around Livestock
- North Carolina State Extension – Livestock Pest Management
- USDA Agricultural Research Service – Fly Management Resources
- Spalding Labs (for info on biological control programs) – Fly Predators Information
Equine
History of the Horseshoe Part 1
If it were not for the horseshoe and wagon wheel, the United States would not have been founded, according to Lee Liles. The owner of the National Museum of Horse Shoeing Tools and Hall of Honor said Oklahoma is the grandest example in the world.
Horseshoe books date back to 400 B.C. In fact, the oldest horseshoe at the museum in Sulphur, Okla., is more than 500 years old from Denmark.
“I don’t like going back much farther than 1860 because we don’t have the documentation to back it up,” Liles explained. “You got a few magazines like the Harper Weekly and the Wallaces’ Report, but you want to verify the facts.”
19th Century Patents
The first patent on a horseshoe manufacturing machine in the United States was issued in 1834 to Henry Burden, a Scottish-born industrial engineer. By 1850, Burden had more than 50 different patents on his machines at Burden Iron Works in Troy, N.Y., Liles added.
This was all before the first horseshoe nail patent, which was issued in 1863 to Daniel Dodge in Keeseville, N.Y. The horseshoe nail is the most difficult nail in history to manufacture, Liles explained.
“It’s got a lot of different tapers to it,” he explained. “The nail needs to be strong and durable enough to drive through a foot, come out, be turned over 180 degrees and clenched down in the horse’s foot.”
The nail industry has changed a lot throughout the years, Liles said. In 1853, the horseshoe nail was made from Swedish Iron, but copper nails have become popular in recent years. The oldest nail company left in the United States was the Capewell Horse Nail Company owned by the Mustad family. The nail company started in 1881, and they recently moved out of the country.
“All of these major shoe companies, tool companies and nail companies were located in the northeast United States,” he explained. “That’s where the population was. There weren’t any companies located down here in the South like Oklahoma or Texas.”
Horseshoeing Literature
Most information on horseshoeing actually came from Germany, Liles explained. German books were first written in 1861 by Leisring and Hardman. In 1882, Lungwitz was added as a co-writer.
“[Leisring, Hardman and Lungwitz] were the main vets at the Royal Veterinary College,” Liles said. “[Hardman] wrote his own first book in 1884 and wrote 24 editions. Nobody else has ever written that many books.”
Liles said books are the greatest assets for education. In 1866, the U.S. Congress adapted the cavalry books would be written on the Dunbar System.
“Alexander Dunbar was a person who our Federal Government paid to teach anatomy to horseshoers back in that era,” Liles explained.
John Kerman, who was running a horse shoeing school at Fort Carlisle, Penn., wrote the book written on the Dunbar System. The first American horseshoe book was written in 1871. In 1902, Kerman came to the shoeing school at Fort Riley, Kan.
“The cavalry has been the main source of horseshoers in this country up to the 1950s,” Liles said. “The Army technical manual, TM-220, has been the most copied horseshoeing book in history.”
In the 1890s, Pennsylvania State recruited Mississippi-native, John Adams as a professor. The university sent Adams to Germany to study under Lungwitz.
“When he came back in about 1896, he and Lungwitz were such good friends that he had permission to write the American edition of the Lungwitz book,” Liles explained. “When he came back, Adams brought an instructor from Germany to Penn State to teach anatomy and horseshoeing to the vet students.”
Even Cornell University and Michigan State University had a protégé of Lungwitz in 1913, Liles said.
William Russell
“We had a great educator in Cincinnati, Ohio, who wrote 15 horseshoeing books from 1879 to 1907,” Liles explained. “His name was William Russell.”
In 1887, the first shoemaking contest was held in Cincinnati, Ohio, where Russell won. “The contest consisted of making 100 shoes on an opry stage in front of 3,000 spectators,” Liles explained.
Russell made 100 horseshoes in two hours and 40 minutes with the help of a team. John Silk, who later became a famous horseshoer, was one of Russell’s competitors.
In the 1890s, many horseshoers, including Russell, created display cases filled with their horseshoes. Many of these display cases are still intact and hanging in the museum. One of the cases was in the World Fair in St. Louis in 1904.
“When it went to the World Fair, they added nails to the case,” he added. A photo of the case at the World Fair was added into one of Russell’s books, and it was one of the last display cases he made. Russell offered all of his collection for sale in the same year.
“He died in 1907,” Liles explained. “He was a sick man, and he was blind when he died.”
Aluminum Horseshoe
Liles also has a case located at the museum built in 1895 had an aluminum horseshoe inside. “That is very rare,” he said. “In that era, they only produced 65 pounds of aluminum per year. Aluminum was a precious metal, and you had to buy it through a jeweler.”
Liles said he does not think the aluminum held up well to wear and tear. William Wedekind received the title, “The World’s Greatest Horseshoer” at the 1892 Chicago World’s Fair. Wedekind even made an aluminum horseshoe in 1883.
“It was so light that it floated on water,” Liles explained. “They can’t duplicate the shoe today to make it float on the water.”
The Right Shoe
Liles said when people come to museum, they are used to dealing with one breed of horse and one discipline with the horse. The type of horseshoe used depends on the breed and the discipline. “In this country, we have roughly 400 different breeds of horses,” Liles said.
Liles said he was a horseshoer, which is a lot different from a cowboy shoer. For instance, a horse that is going to go trail riding or ranching needs a high-quality steel horseshoe.
A show horse will wear aluminum shoes because the aluminum will wear the toe quicker. “It will give him a quicker time to break that shoe in,” he added. “If your shoe isn’t new at the show, he has to get that shoe back to where it feels comfortable.”
Many of the plastic shoes are meant for horses that are on concrete, asphalt or wood. Liles said plastic shoes are commonly used in the circus.
A common misconception is people think the weight of the horseshoe affects a horse in either racing or working. “They think plastic is so much lighter,” he explained. “If that is the case, why don’t you just ride him barefoot?”
To learn more about the history of the horseshoe, visit www.horseshoeingmuseum.com.
This article was originally posted in the July 2016 issue of Oklahoma Farm & Ranch.
-
Country Lifestyle2 years agoJuly 2017 Profile: J.W. Hart
-
Attractions9 years ago48 Hours in Atoka Remembered
-
Equine9 years agoUmbilical Hernia
-
Outdoors8 years agoGrazing Oklahoma: Honey Locust
-
Country Lifestyle4 years agoThe Two Sides of Colten Jesse
-
Farm & Ranch1 year agoFrom Plow to Plentiful: The Most Important Inventions in Agricultural History
-
Farm & Ranch8 years agoHackberry (Celtis spp.)
-
Equine5 years agoOn the Road with Emily Miller-Beisel






