Pneumonia in Horses: Recognizing and Treating a Serious Lung Infection
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Pneumonia in Horses: Recognizing and Treating a Serious Lung Infection

Pneumonia in Horses: Recognizing and Treating a Serious Lung Infection

Pneumonia can strike suddenly or develop as a secondary illness. Learn the causes, symptoms, and care steps that support equine respiratory health.

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Read this if fever and cough show up together

Pneumonia is not a wait-and-see problem. Early veterinary diagnostics and a clean air setup are the difference between a short recovery and a long, expensive mess.

Pneumonia in horses is an infection of the lungs that can be caused by bacteria, viruses, or fungi. It may develop on its own or as a complication following other respiratory illness. Pneumonia is higher risk in foals, older horses, and horses under heavy stress from hauling, training, or poor air quality.

What Causes Pneumonia?

  • Bacterial or viral respiratory infections
  • Aspiration of feed, water, medication, or saliva into the lungs
  • Weakened immune function due to stress, travel, or another illness
  • Prolonged exposure to dusty, moldy, or poorly ventilated environments
  • Complications following respiratory disease outbreaks in the barn

Common Symptoms

  • Persistent cough
  • Fever and depression
  • Rapid or labored breathing
  • Nasal discharge that may become thick or discolored
  • Loss of appetite and weight loss

How to Treat It

  • Contact your veterinarian immediately for evaluation and diagnostics such as ultrasound, endoscopy, or a tracheal wash when appropriate
  • Follow the prescribed treatment plan which may include antibiotics, anti-inflammatories, and other supportive care
  • Move the horse to clean, dust-minimized air with strong ventilation and low-dust bedding
  • Encourage hydration and rest, and avoid work until cleared by your vet
  • Monitor closely for relapse or complications such as pleuropneumonia

Prevention Tips

  • Follow your veterinarian’s vaccination guidance for primary respiratory diseases
  • Improve barn ventilation and reduce dust with low-dust bedding and wetting hay if recommended
  • Quarantine sick horses and monitor temperatures during outbreaks
  • Avoid overexerting horses recovering from illness and give them time to rebuild fitness

Why It Matters

Pneumonia can become life-threatening without prompt treatment. Acting fast, supporting recovery with clean air and rest, and staying disciplined about barn hygiene are key to keeping lungs clear and horses healthy.

Where to Go Next

Founder’s Note · Jon Conklin

What you do in the first hour after a ride often matters more than what you do tomorrow.

Further Reading

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