Equine Deworming Schedule

Did you know it is normal for horses to have a low number of parasites in their gastrointestinal tract all of the time? The goal of parasite control in horses is to balance the number of parasites so we do not have clinical symptoms (weight loss, colic) while at the same time not creating a resistance to medication.

Traditionally horses have been dewormed every two months, but this has led to parasite resistance among horses. For this reason, we recommend performing Fecal Egg Counts (FEG) in the spring (ideally spring and fall) to determine the number of eggs a horse has in its manure.

Red Hills Veterinary Hospital Recommends the Following Paste Deworming Protocol:

Adult Horse Schedule

Low Shedders <200 Eggs per gram of manure

  • Fecal Egg Count performed prior to deworming in spring (ideally spring and fall)
  • Spring (March) – ivermectin (Equell®, Zimectrin®, Rotectin®, IverCare®), moxidectin (Quest®)
  • Fall (October) – ivermectin w/praziquantel (Equimax®, Zimectrin Gold®) or moxidectin with praziquantel (Quest Plus®)

Moderate Shedders 200- 500 Eggs per gram of manure

  • Fecal Egg Count performed prior to deworming in spring (ideally spring and fall)
  • Spring (March) – Ivermectin (Equell®, Zimectrin®, Rotectin®, IverCare, etc), moxidectin (Quest®) or double-dose fenbendazole for 5 days (Panacur® PowerPak)
  • Late Summer (July) – pyrantel pamoate (Strongid paste®, TapeCare Plus®, etc), fenbendazole (Panacur®, Safe-Guard®)
  • Early Winter (November) – ivermectin w/ praziquantel (Equimax®, Zimectrin Gold®) or moxidectin with praziquantel (Quest Plus®)

High Shedders >500 Eggs per gram of manure

  • Fecal Egg Count performed prior to deworming in spring (ideally spring and fall)
  • Spring (March) – ivermectin (Equell®, Zimectrin®, Rotectin®, IverCare®), moxidectin (Quest®) or double-dose of fenbendazole for 5 days (Panacur® PowerPak)
  • Summer (June) – pyrantel pamoate (Strongid paste®, TapeCare Plus®), fenbendazole (Panacur, SafeGuard®) or Oxibendazole (Anthelcide®)
  • Fall (September) – ivermectin w/ praziquantel (Equimax®, Zimectrin Gold®) or moxidectin with praziquantel (Quest Plus®)
  • Winter (December) – pyrantel pamoate (Strongid paste®, TapeCare Plus®), fenbendazole (Panacur®, SafeGuard®) or Oxibendazole (Anthelcide®)

Pregnant mares

  • Fecal Egg Count performed prior to deworming in spring (ideally spring and fall)
  • Deworm with Ivermectin or moxidectin 4-6weeks prior to foaling

Foals

  • 2 months of age – ivermectin (Equell®, Zimectrin®, Rotectin®, IverCare®)
  • 4 months – oxibendazole (Anthelcide EQ®) w Optimally treat with pyrantel pamoate (Strongid®) at 5 months
  • 6 months – moxidectin with praziquantel (Quest Plus®)
  • 8 months – pyrantel pamoate (Strongid®) w Optimally treat with fenbendazole (Panacur®, SafeGuard®) at 9 months
  • 10 months – ivermectin (Equell®, Zimectrin®, Rotectin®, IverCare®)
  • 12 months – fenbendazole (Panacur®, SafeGuard®)