Knowledge Is Your Horse's First Line of Defense
Here's a reality of horse ownership that nobody talks about enough at the beginning: horses are remarkably fragile for such large, powerful animals. Their complex digestive systems, long legs with relatively delicate structures, and sensitive respiratory tracts make them vulnerable to a range of conditions that every owner should understand.
You don't need a veterinary degree to own a horse. But knowing what can go wrong, recognizing the early signs of trouble, and understanding when to call the vet versus when to wait and watch - that knowledge can genuinely save your horse's life. And I'm not being dramatic. Colic alone kills more horses than any other medical condition, and early intervention is often the difference between a mild episode and emergency surgery.
Let's walk through the conditions you're most likely to encounter as a horse owner.
Colic: The Number One Killer
Colic isn't actually a specific disease - it's a broad term for abdominal pain. But it's the leading cause of death in domestic horses, and it should be the first thing on every horse owner's radar.
Types of Colic
- Gas colic - The most common and usually the mildest. Excess gas builds up in the intestines, causing pain. Often resolves with walking and time.
- Impaction colic - A blockage in the intestines, typically from dehydration, inadequate water intake, or eating sand. Requires veterinary treatment.
- Displacement or torsion - A section of intestine shifts or twists out of position. This is a surgical emergency that can become fatal within hours.
- Spasmodic colic - Intestinal cramps, often triggered by stress, weather changes, or parasites. Usually responds to anti-spasmodic medication.
Warning Signs
- Pawing at the ground repeatedly
- Looking at or biting at their flanks
- Rolling excessively or lying down and getting up repeatedly
- Lack of appetite or refusing food (a horse that won't eat is always concerning)
- Decreased or absent gut sounds (you can listen with your ear against their barrel)
- Elevated heart rate (normal resting rate is 28-44 beats per minute)
- No manure production for several hours
- Sweating without exercise
What to Do
Call your vet. While you wait, remove all food but offer water. If the horse wants to roll violently, try to keep them walking gently - violent rolling can cause intestinal torsion. But don't exhaust yourself or the horse trying to prevent calm lying down. Take vital signs if you can: heart rate, respiration rate, and temperature.
Prevention
- Ensure constant access to clean, fresh water
- Feed on a consistent schedule
- Make dietary changes gradually over 7-14 days
- Maintain a regular deworming program based on fecal egg counts
- Provide adequate forage to keep the gut moving
- Minimize sand ingestion with feeders and psyllium programs if needed
Laminitis: When the Hooves Are on Fire
Laminitis is inflammation of the laminae - the tissue that connects the coffin bone to the hoof wall inside the hoof. In severe cases, this tissue breaks down and the coffin bone rotates or sinks within the hoof capsule, a condition called founder. It's excruciatingly painful and can be career-ending or fatal.
Causes
- Dietary - The most common trigger. Overfeeding grain, sudden access to lush pasture, or consuming too much sugar and starch.
- Metabolic - Horses with Equine Metabolic Syndrome (EMS) or Cushing's disease (PPID) are at chronic risk.
- Mechanical - Excessive concussive work on hard surfaces.
- Systemic illness - Severe infections, retained placenta in mares, or colic can trigger laminitis as a secondary complication.
Warning Signs
- Reluctance to walk, especially on hard ground
- "Rocking horse" stance - leaning backward to shift weight off the front feet
- Increased digital pulse in the feet (you can feel it at the fetlock)
- Heat in the hooves
- Lying down more than usual
Response and Prevention
Laminitis is a veterinary emergency. Call your vet immediately. While waiting, get the horse onto soft footing (deep bedding or soft ground), remove all grain and rich feed, and provide grass hay only. Apply ice to the hooves if possible - studies show cold therapy significantly reduces tissue damage.
Prevention centers on diet management: limit pasture access for at-risk horses (especially during spring and fall when grass sugar levels peak), maintain a healthy body weight, and have your vet test older horses for Cushing's disease.
Equine Influenza and Respiratory Infections
Horses get the flu, just like we do. Equine influenza is highly contagious and spreads rapidly through barns and shows. It's one of the most common reasons horses miss training and competition time.
Symptoms
- Dry, hacking cough
- Nasal discharge (initially clear, may become thick and yellow-green with secondary bacterial infection)
- Fever (normal horse temperature is 99-101.5 degrees Fahrenheit)
- Lethargy and loss of appetite
- Swollen lymph nodes under the jaw
Treatment and Prevention
Most cases resolve with rest - typically 2-3 weeks of time off for every week of fever. Your vet may prescribe anti-inflammatories and antibiotics if a secondary bacterial infection develops. Prevention means keeping vaccinations current, quarantining new arrivals for 2-3 weeks, and not sharing water buckets or tack at shows.
Strangles: The Barn's Worst Nightmare
Strangles is a bacterial infection (Streptococcus equi) that causes abscess formation in the lymph nodes of the head and throat. The name comes from the severe swelling that can make it difficult for affected horses to breathe or swallow.
What to Watch For
- High fever (103-106 degrees Fahrenheit)
- Thick, yellow nasal discharge
- Swollen, painful lymph nodes under the jaw and throat
- Difficulty eating or swallowing
- Depression and loss of appetite
Why It's So Feared
Strangles is extremely contagious. A single case can shut down an entire barn. The bacteria spread through direct contact and contaminated surfaces - water troughs, feed buckets, grooming tools, even your hands and clothes. Infected horses can shed bacteria for weeks after symptoms resolve, and some become asymptomatic carriers.
Treatment involves supportive care and allowing abscesses to drain. Antibiotics are controversial - some vets use them early, while others believe they prolong the disease by preventing abscess maturation. Strict quarantine protocols are essential.
Rain Rot and Skin Infections
Rain rot (dermatophilosis) is a bacterial skin infection that thrives in wet, humid conditions. It shows up as crusty scabs along the horse's back, rump, and sometimes legs, with tufts of hair that pull away to reveal raw, pinkish skin underneath.
Treatment
- Keep the horse dry - this is the most important step
- Gently remove scabs (soak with an antibacterial wash first to soften them)
- Apply antibacterial shampoo (chlorhexidine-based products work well)
- Allow affected areas to dry thoroughly after treatment
- In severe cases, your vet may prescribe systemic antibiotics
Prevention involves keeping horses dry when possible, ensuring blankets aren't trapping moisture against the skin, and maintaining good grooming habits. Horses with thick winter coats are particularly susceptible because the coat holds moisture against the skin.
Equine Cushing's Disease (PPID)
Pituitary Pars Intermedia Dysfunction, commonly called Cushing's disease, is a hormonal disorder that affects a significant percentage of older horses - some estimates suggest up to 30% of horses over 15.
Signs
- Long, curly coat that doesn't shed normally (hirsutism) - this is the hallmark sign
- Excessive drinking and urination
- Muscle wasting, especially along the topline
- Abnormal fat deposits (cresty neck, fat pads above the eyes)
- Recurrent laminitis
- Increased susceptibility to infections
- Delayed wound healing
Management
Cushing's is manageable but not curable. The medication pergolide (sold as Prascend) is the standard treatment and is effective for most horses. Regular veterinary monitoring, dietary management (low sugar and starch), and vigilant hoof care are essential. Many horses with Cushing's live comfortably for years with proper management.
Thrush: The Silent Hoof Problem
Thrush is a bacterial infection of the frog (the soft, triangular structure on the bottom of the hoof). It's incredibly common, especially in wet environments or stalls that aren't cleaned regularly.
How to Spot It
- Foul, unmistakable smell when picking the hooves
- Black, tarry discharge in the grooves of the frog
- Softened, crumbly frog tissue
- Sensitivity when you clean the affected area
Treatment and Prevention
Mild thrush responds to improved hygiene and topical treatments like copper sulfate solutions or commercial thrush products. Keep stalls clean and dry, pick hooves daily, and schedule regular farrier visits. Severe thrush can invade sensitive tissue and cause real lameness, so don't ignore it.
When to Call the Vet: A Quick Reference
Knowing when to call is one of the most valuable skills a horse owner can develop. Call immediately if you observe:
- Signs of colic lasting more than 30 minutes
- Severe lameness (non-weight-bearing on any leg)
- Profuse bleeding or a wound that exposes bone, tendon, or joint
- Fever above 102 degrees Fahrenheit
- Difficulty breathing or rapid respiratory rate at rest
- Eye injuries or swelling (eyes are emergencies - always)
- Signs of laminitis
- Inability to stand
- Severe diarrhea
- Any situation where your gut tells you something is seriously wrong
Don't worry about bothering your vet with a call that turns out to be nothing. Good equine vets would rather take a quick phone call than treat a condition that's been festering for three days because the owner didn't want to be a bother. Trust your instincts. You know your horse better than anyone.