By Garrett Metcalf, DVM

Splint bone issues in horses are a common problem across various ages and disciplines. These injuries can be caused by excessive work in young horses or by traumatic injuries. The splint bones play an important role in the stability of the joints they help form at the knee or hock level. This article will discuss the different types of splint bone injuries and their treatments.

The splint bones are small bones that are intimately attached to the inside and outside of the cannon bone. To understand which section is injured, it’s helpful to break the splint bone down into three parts: the head, the mid-body section, and the button. The head of the splint bones forms part of the carpus (knee) in the forelimb and part of the hock in the hindlimb. Research has demonstrated the important role splint bones play in the stability of these joints. A study conducted at Colorado State College of Veterinary Medicine noted that when larger portions of the splint bone were removed, rotational stability in the carpus was significantly impacted, and other directional forces were also affected.

Diagnosing splint bone injuries is generally straightforward with radiographs, though in some cases, ultrasound can also be helpful. Bone or callus formation around these splint bone injuries can compress the suspensory ligament, leading to chronic pain and lameness issues.

Popped Splints

“Popped splints” refer to injuries that generally occur in younger horses entering training and work. These injuries typically affect the inside forelimb splints and can be quite painful, leading to loss of training time. A popped splint is the result of tearing the ligament that holds the splint bone to the cannon bone, known as the interosseous ligament. When the ligament is torn, bleeding can occur, disrupting the periosteum of the bones and causing a callus or firm bony lump.

The inside splint on the forelimb is more prone to injury because it bears direct load with the second carpal bone at the head of the splint bone. This places direct force on the splint bone, while other splint bones share the load with adjacent carpal or hock bones.

Popped splints are often painful, with noticeable swelling near the splint bone and heat present. When palpated, a moderate amount of pain will be elicited.

Treatment for popped splints typically includes rest, systemic anti-inflammatory drugs, and local anti-inflammatory treatments. Acute inflammation can be soothed with ice, cold therapies, and bandaging. Alternative therapies such as cold laser therapy, MagnaWave, or shockwave therapy can also be incorporated into the treatment plan. In more extreme cases, surgical removal of the bone callus may be necessary to prevent compression of the suspensory ligament.

Splint Bone Fractures

Splint bone fractures can occur at any level of the splint bone, but some areas are more commonly fractured. The distal one-third of the splint bone is most often fractured in the forelimbs. These fractures are occasionally associated with forelimb suspensory ligament issues. The suspensory ligament has a small attachment to the button of the splint bone, and when the lower limb is heavily extended, bending forces on the lower part of the splint bones can lead to fractures.

In the hind limb, the outside (lateral) splint bone is the most commonly fractured. These fractures often result from kicking injuries. When two horses don’t get along and kick at each other, the lateral splint bone is often the one that gets broken. These injuries are particularly problematic due to the open wounds that are heavily contaminated with manure, hair, and dirt, as well as injuries to flexor tendons.

Fractures near the head of the splint are especially problematic and can sometimes be career-ending or life-threatening. These fractures can involve the joints of the carpus or hock, leading to septic arthritis, severe lameness, and possibly serious instability of the corresponding joint. The rule of thumb for equine veterinarians when surgically removing damaged or fractured splint bones is the “two-thirds, one-third rule.” This means the lower two-thirds of the splint bone can be safely removed, but the upper one-third should be preserved whenever possible. Complete removal of the upper one-third of the splint bone can lead to chronic lameness or, worse, catastrophic joint dislocation when the horse attempts to rise from anesthesia. In some cases, the fractured upper one-third of the splint can be repaired using plates and screws to maintain stability in the joint.

Smaller traumatic injuries to the splint bone often occur from interference injuries or when the horse’s own feet hit the inner splint bones during work. These injuries can be prevented with the use of splint boots on the lower limbs during exercise. Some lower limb boots provide support to the fetlock and suspensory ligament, which can help prevent distal splint bone fractures, although they are not always fully protective.

Conclusion

Some splint bone injuries are relatively simple and common issues that many horse owners can address. However, more serious traumatic fractures and wounds related to splint injuries should be examined by a veterinarian. If you suspect a splint bone injury, it’s best to consult a professional to ensure proper treatment and prevent further complications.

Read more in the September 2025 issue of North Texas Farm & Ranch.

If you spend any amount of time around horses, you learn fairly quickly that bumps, scrapes, and cuts are almost inevitable. Horses can find ways to injure themselves in well-maintained pastures, clean stalls, and even while standing quietly at the fence. While some wounds are minor and heal without much trouble, others can become serious if they are not handled correctly from the start. Knowing how to assess a wound and provide basic first aid can make a real difference in both healing time and long-term soundness.

The first step in dealing with any injury is evaluating where it is located and how severe it appears. Wounds on the legs deserve particular attention. Compared to the body, the lower limbs have very little muscle or fat between the skin and critical structures such as joints, tendons, ligaments, and bone. Because of this, even a small cut can turn into a major problem if it involves deeper tissues.

Certain areas are especially concerning. Cuts on the front of the knee (carpus), the front of the hock, the back of the pastern, or around the heel bulbs are more likely to involve joints or tendons. Large, gaping, or bleeding wounds are usually easy decisions—those warrant a call to your veterinarian. Smaller wounds can be more difficult to judge, particularly when it is hard to tell how deep they go. If you are unsure whether a wound penetrates beyond the skin, it is best to contact your veterinarian before attempting home treatment.

Lameness is another important factor to consider, but it can be misleading. Some horses with fresh joint wounds may not appear lame at first, even if a joint is involved. Over time, however, infection can set in, leading to severe or even non-weight-bearing lameness. On the other hand, injuries involving tendons, ligaments, bone, or extensive soft tissue damage often cause immediate and obvious lameness. When a horse is suddenly very sore or unwilling to bear weight, more serious injuries such as fractures must be ruled out.

Being prepared is one of the best things a horse owner can do. A basic first aid kit kept in the barn or trailer allows you to respond quickly when an injury is discovered. The goal of initial wound care is simple: clean the wound, protect it, and prevent further contamination until healing begins or veterinary care is provided.

Most wounds are dirty when first found. Flushing away debris is far more important than applying medication right away. Clean tap water or sterile saline works well for this purpose. A mild antiseptic solution can be used, but it should always be diluted. Strong solutions can damage healthy tissue and slow healing. A good rule of thumb is to dilute antiseptics until the solution is a light tea color. Gentle cleaning is key—scrubbing aggressively can do more harm than good.

Once the wound is clean, a topical treatment may be applied if appropriate. For minor cuts and scrapes, a simple triple antibiotic ointment is often sufficient. These products are widely available and effective when used correctly. In areas where bandaging is difficult or impossible, spray-on products designed to protect wounds can help keep dirt and insects out while the surface heals.

Bandaging can be extremely helpful for many leg wounds. A properly applied bandage helps keep the area clean, provides support, and protects the wound from additional trauma. Basic bandaging supplies include non-stick pads, gauze, cotton or combine rolls, and a secure outer wrap. Bandages should be snug but never tight enough to restrict circulation. They also need to be checked and changed regularly to prevent moisture buildup and skin irritation.

Even with good first aid, it is important to know when to step back and call the veterinarian. Wounds that are deep, involve joints, produce significant swelling, or do not improve over a few days should be professionally evaluated. Your veterinarian can also guide you if you are unsure whether a wound can be managed at home.

Horses may be accident-prone, but prompt and thoughtful wound care goes a long way. A calm assessment, proper cleaning, and knowing your limits as a caretaker can help ensure small injuries stay small and your horse stays on the road to recovery.

Winter brings its own set of challenges. For ranchers and horse owners, few are more pressing than keeping water available. Cold weather, frozen tanks, and ice buildup can cut animals off from the single most important nutrient. Cattle can survive on short pasture and horses can get by on hay, but without water, everything stops. Hydration affects digestion, body temperature regulation, and overall health. That’s why every winter, producers across Oklahoma and North Texas turn their focus to one essential question: how do you keep water flowing when the mercury drops?

The struggle against frozen water isn’t new. Generations before electricity, rural families learned to outsmart the cold with ingenuity and grit.

Chopping Ice – One of the oldest solutions was also the most labor-intensive: grabbing an ax or a bar and breaking ice daily. While effective, this method demands constant attention and becomes impractical during long cold snaps. Horses and cattle can quickly fall behind on intake if a rancher misses even a few hours.

Windmills and Groundwater – Traditional windmills pumping from underground aquifers often provided water that was warmer than surface tanks, since groundwater stays at a relatively stable temperature year-round. Many old ranches still rely on this method, though windmill upkeep is a challenge in itself.

Insulated or Buried Lines – Families learned to bury water lines below the frost line or wrap them with insulating material. That practice continues today, and it remains one of the most effective long-term strategies for preventing frozen pipes.

Floating Devices – Ranchers also improvised with floating logs, balls, or even old tires in stock tanks. The movement helped keep ice from sealing solid and gave livestock a space to drink. While not foolproof, the idea is still used in remote areas.

These methods show the persistence of rural people, but modern technology has added new tools to the fight.

Today, ranchers and horse owners have a wide menu of winter water solutions, ranging from simple add-ons to major investments.

Heated Waterers – Electric or propane-powered waterers remain the most reliable way to ensure animals never face ice. Available in tank heaters, floating units, or fully enclosed automatic waterers, they keep temperatures above freezing even during prolonged cold. The trade-off is cost: electricity bills can spike, and in rural areas, running lines to distant tanks may not be practical. Still, for barns, lots, and heavily used pastures, heated waterers are a standard tool.

Solar Solutions – Where electricity isn’t available, solar-powered heaters have gained traction. Panels run small heating elements or pumps, reducing reliance on grid power. Though initial costs are high, they provide independence and sustainability, especially in sunny but cold climates.

Geothermal Systems – Some operations use earth’s steady underground temperature to keep water from freezing. By burying lines or tanks and tapping into geothermal exchange, water stays at safe levels without heavy energy use. These systems are especially effective when designed into new construction.

Automatic Waterers with Constant Flow – In some cases, ranchers use systems that keep water trickling constantly. Movement prevents ice buildup, though it can waste water if not carefully managed. This method works best where water supply is abundant and low-cost.

Tank Additives – While chemicals are never recommended for human or animal safety, some producers use nontoxic dyes or floating covers to limit algae and ice. These are niche options, but they illustrate the creativity at play.

Practical Ranch Hacks – Many ranchers mix and match. Submersible de-icers paired with insulated tank covers, old truck hoods repurposed as windbreaks, or even placing tanks on south-facing slopes to maximize sun exposure can make the difference between usable and frozen water.

Why does all this matter so much? Because winter dehydration can have cascading effects. Horses, for instance, are prone to impaction colic when water intake drops. Cattle that can’t drink freely eat less feed, lose weight, and struggle to maintain body condition. Calves and older animals are especially vulnerable. Even wildlife around a farm benefits from accessible water sources.

Beyond animal health, reliable winter water reduces labor stress. Instead of breaking ice in multiple tanks at dawn and dusk, producers with dependable systems can focus on feeding, calving prep, or other winter tasks. In a season where daylight is short and weather unpredictable, those saved hours are invaluable.

Water is the lifeblood of the ranch, and winter tests every producer’s ability to keep it flowing. From chopping ice with an ax to installing solar-powered heaters, solutions have evolved, but the goal is the same: hydration without interruption.

For some, a floating log and a good bar might still get the job done. For others, investment in heated automatic waterers pays off every year. The choice depends on herd size, geography, and budget. What unites them is the understanding that winter water is not optional. It is essential, and it always will be.

References

Oklahoma State University Extension. Winter Livestock Water Management. https://extension.okstate.edu

Texas A&M AgriLife Extension. Cold Weather Livestock Care. https://agrilifeextension.tamu.edu

University of Minnesota Extension. Horse Hydration and Colic in Winter.

USDA Natural Resources Conservation Service. Livestock Watering Systems.

Aermotor Windmill Company. Windmills and Water Supply.