Equine
Equine Laminitis – No Foot No Horse
Laminitis is probably by far the most devastating disease that a horse and horse owner will ever face. The definition of laminitis is nothing more than inflammation of the lamina or the tissue of the foot, but that does not describe the devastating pain and struggle that a horse faces with this disease. There are many sources of laminitis or foundering in horses. I will cover some of the most common causes, ways to avoid these causes and treatments.
The foot is an amazing organ for the horse and it is amazingly resilient but at the same time very fragile. The equid foot has to endure nearly constant loads of just daily locomotion but also endure very high levels of load during events such as racing, jumping and pulling. The tissue that holds the foot attached to the coffin bone is only a few millimeters thick but is amazingly strong. The tissue looks like Velcro under a microscope and is very rigid but also at the same time allows the foot to flex, grow and expand. The metabolic energy and blood flow rate that feet require to with stand this load is incredibly high as well. The blood flow to the very farthest part of the horse is complex and important when addressing laminitis which will be discussed later.
Causes –
- Grain overload or carbohydrate overload
Consumption of a large amount of grain can lead to gastrointestinal disruption leading to founder. A horse that breaks into the feed shed and consumes large amounts is the most common scenario that is seen. These horses need to have as much grain removed from their stomach as soon as possible with a stomach tube and then products such as activated charcoal administered to help bind toxins that may be produced from bacteria dying off from the high grain load in the gut.
- Metabolic conditions – PPID (Cushings) and EMS (Equine Metabolic Syndrome)
Horses with cushings have high levels of glucocorticoids circulating in their blood leading to disruptions of the lamina along with other body systems. These abnormally high glucocorticoids are caused by an abnormality with the pituitary gland in the brain. This can be corrected when diagnosed with medication.
The EMS horses have high levels of insulin which has been found experimentally to induce laminitis. Horses that are obese and get very little exercise are at risk of EMS. EMS is reversible and prevented by managing diet more closely, routine exercise and preventing access to lush green pastures.
- Lush green grass (Grass Founder) – commonly seen in overweight EMS horses
Similarly, horses with underling EMS can found on lush green growing grass because of the high sugar content in these grasses. In the spring with good grains and plenty of sunshine grass can grow rapidly. This rapid growth phase of grass produces larger amounts of sugars in the blades of the grass during photosynthesis. It has been discovered that during peak sunlight is when the highest sugar content is found in the grass because of higher amounts of photosynthesis occurring in the grass blades.
- Endotoxemia – Caused by severe illness such as sepsis, colic, pneumonia
Horses that have serious bacterial infections or acute colitis can absorb endotoxins released by the dead bacteria. Horses are extremely sensitive to endotoxins and these toxins are called LPS (lipopolysaccharides) that make up part of the bacteria cell wall. When a large amount bacteria are killed off with antibiotics or disruptions in the horses gut these toxins are absorbed causing lots of problems for the horse.
- Overloading weight – injuries that cause the horse to bear more weight on another limb
Overbearing weight on other limbs from an injury to another limb can cause contralateral limb laminitis. Just by shear overloading force breaks down another foot. This can occur when a major injury occurs to a limb forcing more weight onto another because of pain. This is seen commonly with fractures, serious soft tissue injuries and neurologic conditions. This is what led to the death of Barbaro, the famous thoroughbred race horse that fractured his leg during the Preakness.
- Black Walnut – Shavings containing black walnut can induce laminitis
The species of tree can be very toxic to horses and must never be used as bedding or shavings that will come in contact with horses. It has been estimated that shavings containing as little as 5% black walnut can be toxin to horses. Some research has even thought that contact along can be deadly.
Diagnosing laminitis is rather straight forward. Examination of the horses gait at a walk or trot will indicate lameness. Most horses in acute founder will be severely lame at a walk and will be shifting weight back to the hind limbs in order to move or change directions when ask to ambulate. Horses will have an increased pulse in the arteries near the feet called a digital pulse. This pulsation of blood is similar to the throbbing sensation that we feel have an acute injury to a finger or limb and is quit notable in acute laminitis. Heat can also be noted around the coronary bands and hoof wall.
Radiographs or x-rays are used determine the severity of laminitis by measuring the separation of the coffin bone from the hoof wall. Venograms are also used to identify the blood flow damage to the foot using contrast dies injected into the digital veins while a tourniquet is applied above the foot. The contrast highlights the blood vessels so they can be seen with x-ray.
Treatment of Laminitis
First of the underlying cause of the laminitis must be eliminated or managed in order to get the laminitis under control or the battle will be very difficult. For example if a horse with EMS is not put on a serious diet and their weight managed you will be fighting a losing battle. Secondly a veterinarian and a farrier team are going to be needed to help manage the horse’s feet to prevent further laminar damage and provide the best possible foot support needed. Veterinarians must provide pain management, systemic care or treatment of the underlying illness and administer other medications that can benefit the horse in order to eliminate laminitis. Farrier’s have the daunting task of providing support of 1,000 pound or more horse that has feet sometimes the size of tea cups. The goal for farriers is to provide the proper support with various different methods across the sole of the foot at the same time eliminating stress and forces that inherently designed into the horse’s foot. Care for the horse’s feet is very critical and requires a skilled team to provide the best care. Lastly is that you have to be in it to win it. Short cuts and half hearted attempts are usually not very fruitful when it comes to dealing with laminitis. Below is a list of treatments used to treat laminitis.
- Medication or surgery to correct the underlying cause
- Cryotherapy or icing of the lower limbs and feet
- Systemic anti-inflammatory drugs and pain management
- General health care such as a good diet, deep beading, management of other illnesses and supportive care
- Corrective foot care
- Surgical intervention with tenotomies (cutting the deep digital flexor tendon)
- Slings (rarely available and only in extreme cases)
Laminitis or founder can be very challenging to correct or manage. It is not uncommon to humanely euthanize horses for acute or chronic causes of founder. These horses are often losing weight, unable to get up and ambulate well enough to eat or drink frequently enough. Often it is important to have a discussion of quality of life on behalf of the horse and do what is necessary so the horse is not suffering. These are always difficult decisions but they are necessary and always good to have these with your veterinarian and farrier that are caring for the horse.
Read more about your horse’s health in the latest issue of Oklahoma Farm & Ranch magazine.
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.
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