Intestinal Parasites in Horses: Signs, Treatment & Prevention

Intestinal Parasites in Horses: How Worms Impact Health & What You Can Do

Internal parasites can lead to everything from a dull coat and poor condition to dangerous colic and internal damage. Here’s how to stay ahead of the problem.

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Read this if your horse is losing condition or looks “off” for no obvious reason

Parasites are common and manageable. The win is a repeatable plan: fecal egg counts, smart manure control, and a vet-guided strategy that fits your region and herd.

Intestinal parasites, commonly referred to as worms, are one of the most widespread but preventable threats to equine health. If left unchecked, they can rob your horse of nutrients, contribute to colic risk, and create long-term internal stress.

Types of Common Equine Parasites

  • Small strongyles (cyathostomes) - The most common; can encyst in the gut lining.
  • Large strongyles - Historically dangerous but now less common due to modern deworming programs.
  • Roundworms - Primarily affect foals and young horses.
  • Tapeworms - Can contribute to digestive upset and colic risk.
  • Pinworms - Can lead to tail rubbing and irritation.

Signs Your Horse Might Have Parasites

  • Weight loss or difficulty gaining condition
  • Dull, coarse coat
  • Diarrhea or inconsistent manure
  • Frequent tail rubbing
  • Signs of colic or discomfort
  • Sluggish behavior or poor performance

Prevention and Management

  • Use fecal egg counts to guide a strategic deworming plan
  • Rotate pastures and avoid overgrazing
  • Remove manure regularly from stalls and turnout areas
  • Provide clean, uncontaminated water and feed
  • Work with your vet to adjust for regional and seasonal risks

Why It Matters

Parasite control is not just about deworming. It’s about long-term gut health, performance, and prevention. A smart program keeps your horse healthier, reduces unnecessary treatments, and helps your barn run cleaner.

Where to Go Next

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Where To Go Next

Turn the idea into a routine.

If this topic connects to what you are seeing in your horse, these are the three cleanest next steps. Start with direction, then choose the product format that fits the way your barn actually works.

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Find The Fit Find the right product Answer a few practical questions and match your horse’s workload, age, and routine to the best Draw It Out® path. Use the Solution Finder
Daily Recovery Shop liniment gels Explore stay-put liniment gel options built for targeted application, daily recovery routines, and real barn use. Shop the collection
Routine First Build a prehabilitation routine Learn how riders support comfort, soundness, and consistency before small issues start steering the program. Read the guide

Best next move: use the Solution Finder first when the issue is unclear. Go straight to the liniment gel collection when you already know the format you want.