Intestinal Parasites, Fecal Egg Counts, and Deworming

Why are we always talking about horse poop? Intestinal parasites are a very common problem among horses. They can cause clinical signs that include rough hair coat, poor performance, colic, and diarrhea. Some horses can carry a high parasite burden and show no clinical signs; these horses contaminate pastures and infect other horses.

When you submit a fecal to ECP, our parasitology department examines it under the microscope and identifies the number and type of parasite eggs. This allows us to make deworming recommendations based on what your individual horse needs. Many dewormers are not effective today due to overuse and misuse. Most horses only need dewormed once or twice a year. Fecal egg counts help us ensure your horse stays healthy. Stress, new horses in the pasture, and pasture management can all affect the worm burden a horse will carry.

Special Note for Foals

Foals are extremely susceptible to intestinal parasites. Threadworms ( Strongyloides westerii) primarily affect young foals under the age of 3 months. Roundworms ( Parascaris equorum) primarily affect foals between 6 months and 2 years of age. Proper deworming during the first year of life can prevent these infections.

When to Submit Fecal Samples

Equine Health Tips

• Biosecurity in the Barn
• Understanding and Treating Scratches in Horses
• Emergency Services: When to Call Equine Field Service Immediately
• Recommended Spring Vaccinations
• Riding Your Horse When It’s Cold Outside
• Equine First Aid for Owners
• Prevent Equine Illness during Rainy Season
• Intestinal Parasites, Fecal Egg Counts, and Deworming
• Leptospirosis—the disease in horses
• Equine Hoof Abscesses

Request an Appointment

We’re here to partner with you and your veterinarian to provide specialized care for your horse. Whether you're scheduling a routine evaluation or follow-up after a referral, our team is ready to help you take the next step.

To request an appointment, please call or text us at 765-494-8548

For urgent needs or emergencies, our team is available 24/7 at 765-494-8548