Treating an open wound on a horse starts with stopping the bleeding, cleaning the area thoroughly, and deciding whether the injury needs veterinary attention. Horses are prone to cuts, scrapes, and lacerations, and most owners will deal with wound care at some point. The steps you take in the first hour matter more than almost anything else for how well the wound heals.
Assess the Wound Before You Touch It
Before you do anything, make sure you can work safely. A horse in pain can kick, bite, or bolt. Have someone hold the horse or secure it in cross-ties. If the horse is too agitated to handle, wait for help rather than risking injury to yourself.
Once you can get close, look at where the wound is and how deep it goes. Location matters as much as size. Wounds over joints, tendon sheaths, or along the back of the lower leg (where the flexor tendons run) are high-risk injuries even if they look small. Puncture wounds are deceptive: a nail or wire that barely breaks the surface can penetrate a joint capsule or tendon sheath underneath, leading to a life-threatening infection. If you can see bone, tendon, or any white or yellow structure inside the wound, that horse needs a vet.
The Merck Veterinary Manual recommends referral to a surgical facility for tendon injuries, joint penetration, degloving injuries (where skin is peeled away from underlying tissue), severe blood loss, neurological signs, or any wound involving the chest or abdominal cavity. These are not wait-and-see situations.
Stop the Bleeding
Most wounds bleed enough to look alarming but stop on their own within 10 to 15 minutes. Apply direct pressure with a clean towel, a stack of gauze pads, or even a disposable diaper in a pinch. Hold firm, steady pressure without lifting the material to peek. If blood soaks through, add more material on top rather than removing what’s already there.
If bright red blood is spurting rhythmically, that suggests an artery is involved. Maintain heavy pressure and call your vet immediately. Arterial bleeding on a limb can sometimes be slowed with a pressure bandage wrapped snugly above the wound, but this is a temporary measure until professional help arrives.
Clean the Wound Thoroughly
Once bleeding is under control, cleaning is the single most important thing you can do to prevent infection. The goal is to flush out dirt, hair, debris, and bacteria before they settle into the tissue.
The best cleaning solution is normal saline: 0.9% sodium chloride. You can buy premade sterile saline at a feed store or pharmacy, or make your own by dissolving two teaspoons of table salt in one quart (about one liter) of clean water. Use a large syringe (35 to 60 mL) to irrigate the wound with moderate pressure. You want enough force to dislodge debris but not so much that you drive contaminants deeper into the tissue. A garden hose on gentle flow also works for the initial rinse if you don’t have a syringe handy.
For added antiseptic protection, you can add povidone-iodine to your saline to create roughly a 1% solution. This looks like weak tea. Stronger concentrations can actually damage healthy tissue and slow healing. Avoid hydrogen peroxide, rubbing alcohol, and full-strength betadine, all of which kill the very cells your horse needs to repair the wound. Flush generously. It’s hard to use too much saline on a fresh wound.
Decide: Bandage or Leave It Open
Whether to bandage depends on where the wound is. Lower limb wounds below the knee or hock heal better when bandaged. Horses have very little soft tissue on their lower legs, blood supply is limited, and the skin moves constantly over joints. Bandaging keeps the wound moist, protects it from flies and dirt, and reduces the swelling that slows healing.
Wounds on the upper body, shoulder, hip, or barrel are usually left open because bandaging those areas is impractical. These locations have a better blood supply and tend to heal faster on their own. Keeping them clean and applying a thin layer of a wound-safe ointment or hydrogel is typically sufficient.
How to Bandage a Lower Limb Wound
A proper lower limb bandage uses three layers, each with a specific job. Start by placing a non-stick wound pad (like a Telfa pad) directly over the cleaned wound. This prevents the bandage from sticking to raw tissue and tearing new cells off when you change it.
The first wrap layer is rolled cast padding, applied snugly over the wound pad and extending several inches above and below the injury. This layer cushions and absorbs drainage. Keep it firm enough that it won’t slip, but don’t crank it tight.
The second layer is sheet cotton, which provides structural support to the limb. This is especially important on legs, where even pressure helps control swelling.
The third layer is brown gauze or a cohesive bandage (like Vetrap), pulled taut across the front of the leg and laid smoothly across the back. This holds everything in place. The key mistake people make is wrapping this outer layer too tightly, which can damage tendons and restrict blood flow. You should be able to slide one finger under the top edge of the finished bandage.
Change bandages every one to two days for a fresh wound, or daily if there’s heavy drainage. Every bandage change is a chance to flush the wound again with saline and check for signs of trouble.
Recognizing Infection Early
A wound that’s healing normally will have some swelling and warmth for the first few days. That’s the inflammatory phase doing its job: white blood cells arrive within the first 24 hours and spend up to two weeks clearing bacteria and dead tissue. By day four or five, you should see pink granulation tissue (healthy new tissue with a bumpy, beefy-red appearance) starting to fill the wound bed.
Infection looks different. Watch for swelling that keeps getting worse instead of gradually improving, heat that intensifies rather than fading, and discharge that turns thick, yellow-green, or foul-smelling. A horse at Michigan State’s veterinary hospital presented with an infected forelimb wound that had swollen to twice its normal size, was hot to the touch, painful on contact, and draining foul-smelling discharge from multiple openings. That’s an advanced infection, but the early signs (increasing heat, worsening swelling, bad smell) are the same ones you’d catch at home if you’re paying attention during bandage changes.
A fever above 101.5°F (the normal range for adult horses is 99 to 101.5°F) alongside a worsening wound is another red flag. If you suspect infection, call your vet. Infected wounds often need systemic antibiotics, not just topical treatment.
Preventing Proud Flesh
Proud flesh, or exuberant granulation tissue, is one of the most common complications in equine wound healing. It happens when the granulation tissue that normally fills a wound overgrows, rising above the skin edges and preventing the skin from closing over it. It’s most common on lower limb wounds where there’s more movement and less soft tissue.
Bandaging is your best prevention tool. A well-applied bandage provides gentle, even pressure that discourages granulation tissue from bulging outward. Wounds left unbandaged on the lower legs are far more likely to develop proud flesh. If you notice the pink tissue starting to mushroom above the wound margins, your vet can trim it back or apply a topical corticosteroid to slow its growth. Small amounts of proud flesh caught early are easy to manage. A large mass that’s been growing for weeks is a much bigger project.
Pain Relief
Horses hide pain well, but a significant wound hurts, and unmanaged pain causes stress that slows healing. The two most commonly prescribed pain relievers in equine medicine are phenylbutazone (“bute”) and flunixin meglumine (“banamine”), both available through your vet.
Bute is typically the first choice for musculoskeletal and wound pain. Your vet will determine the right dose and duration based on your horse’s weight and the severity of the injury. At appropriate doses, bute is relatively safe for short-term use, but higher doses or prolonged use can cause stomach ulcers and kidney problems. Flunixin meglumine is another option, particularly useful when there’s significant inflammation. Your vet may also recommend firocoxib, a newer anti-inflammatory that’s gentler on the stomach and approved for use up to 14 days.
Don’t reach into your tack room and dose bute on your own for an extended period. These medications have real side effects, and your vet can help you find the lowest effective dose.
Tetanus Protection
Tetanus is caused by bacteria that thrive in soil, and horses are among the most susceptible animals. Any open wound is a potential entry point. The American Association of Equine Practitioners notes that the severity of a wound does not predict the risk of tetanus: even superficial wounds have caused clinical tetanus in horses.
If your horse is current on vaccinations, it’s likely protected. But if the last tetanus booster was more than six months ago, the AAEP recommends a booster at the time of injury. If you don’t know your horse’s vaccination history, or the horse has never been vaccinated, your vet can administer tetanus antitoxin for immediate short-term protection alongside the toxoid vaccine to build longer-lasting immunity. This is not something to skip or delay.
What Healing Looks Like Over Time
Equine wound healing follows a predictable sequence, though the timeline varies with wound size, location, and how well you manage it.
The inflammatory phase starts immediately and lasts roughly two weeks. The wound looks swollen, warm, and may ooze clear or slightly bloody fluid. This is normal. White blood cells are flooding the area to fight bacteria and break down damaged tissue.
Around day four or five, the repair phase begins. Pink granulation tissue appears in the wound bed and gradually fills the defect from the bottom up. Skin cells at the wound edges begin migrating inward to close the gap. This phase can last weeks to months for large wounds.
The final maturation phase is the longest. New tissue gradually strengthens and reorganizes, but healed skin on a horse never regains the full strength of the original. A large wound that heals by second intention (filling in on its own rather than being sutured) may take three to six months to fully close, and the resulting scar will often grow white hair or no hair at all.
Throughout this process, your job stays the same: keep the wound clean, change bandages regularly, watch for proud flesh and infection, and give your vet a call when something doesn’t look right.