Basics Of Horse Deworming

Basics of horse deworming are the traditional method, every 6-8 weeks, but that may be slowly changing as research continues to grow.

 Basics of horse deworming research topic.
often to deworm your horse.
There is not a lot of information yet supporting the latest debate.

The basics of horse deworming have been my experience that it works better to rotate.
Continue reading if you are interested in this topic.

The first and most important thing to do is contact your veterinarian to put together the best de-worming program for your horse.

There are lots of reasons that can affect how your deworming patterns are successful or not with parasites (worms).

  • Location
  • Number of horses pastured together
  • Age
  • Pasture management
  • How you rotate your de-wormers

basics of horse deworming


Different climates and temperatures can have different effects on parasites. Depending on where you live will help you determine the best deworming program for your horse.

The best way to pinpoint what parasites your horse may have is to get a fecal worm count done.
Your veterinarian can do this, or you can purchase a fecal test kit that will show you the specific parasites to target.

Number of Horses Pastured Together

The number of horses grazing in the same pasture together can be at more risk for parasite infestation due to the manure.

Rotating your horses in different grazing pastures can help reduce the risk.

Pasture Management

Very important to clean and maintain your pasture, paddocks, and barns daily, or maybe every other day plays a massive role in parasite control.
Horses pass parasites through their manure.

I know this sounds nasty, but horses will pick through manure because of the nutrients that past through. It isn’t because they are hungry.

Therefore, they graze in the same area. Your horse will re-ingest the worms and eggs, which starts the cycle all over again.

You will have to either haul the manure off or, if possible, you can stockpile it and spread on your pastures in the spring.

The Correct Way And The Wrong Way Of  Spreading Manure On Your Horse’s Pasture.

basics of horse deworming

Compost> Is the correct way to spread manure on your pastures can be a great option if you have the means and different fields.

It has nutrients for plant growth and composting kills parasites and larvae.
It naturally turns to dirt and makes fertilizer.

Fresh Manure> Is the wrong way to spread manure on your pastures because of living worms, and eggs and that is a risk for parasite re-infestation.

Don’t spread manure when the ground is frozen or wet because this will prevent the nutrients from soaking in the dirt.


A lot of people guess their horse’s weight, but you really should weigh your horse, so you know for sure if your horse is receiving enough of the medicine to do the complete job. When it comes to babies, you want to weigh them.

Rotate Your Dewormers.

Rotating your horse’s de-wormer significantly affects parasite control due to them becoming immune to and then not working correctly.

I am not talking about just switching the brand names; You have to change up to another type of de-wormer that has a diverse chemical base in it.
(I will explain below).

Even though there are several different brand names, they have the same chemicals or ingredients in them.

When you rotate to a different de-wormer, you are also changing up the chemical class.
More and more parasites are becoming resistant to certain de-wormers because they are being overused and not correctly rotated.

There are three different chemical-based (class) de-wormers

  1. Macrocyclic Lactonesbasics of horse deworming
  2. Benzimidazole
  3. Pyrimidine

Another chemical base de-wormer that “technically” doesn’t fall into the same categories
Praziquantel – targets tapeworms (has a class of its own) and is combined with macrocyclic lactones.

Macrocyclic Lactones

→ Active ingredients: Ivermectin & Moxidectin

– Product (brand names)

  • Ivermectin Paste (ivermectin)
  • Horse Health (ivermectin)
  • Ivercare (ivermectin)basics of horse deworming
  • Quest (moxidectin)basics of horse deworming


→ Active Ingredients: Fenbendazole & Oxibendazole

– Product (brand names)

  • Anthelcide (oxibendazole)
  • Safeguard (fenbendazole)
  • Panacur (fenbendazole)basics of horse deworming


→ Active ingredient: Pyrantel Pamoate

– Product (brand name)

    • PraziquantelPyrantel paste (pyrantel pamoate)basics of horse deworming
    • Strongid (pyrantel pamoate)

→ Active ingredient: Praziquantel

– Product (brand name)

    • Equimax (praziquantel/ivermectin)
    • Zimectrin gold (praziquantel/ivermectin)
    • Quest plus (praziquantel/moxidectin)

If you have any questions about this page, please ask me. I will answer as soon as I receive your message.
Also, I would love to hear any comments you may have about this page.

Thank you for stopping in and reading my page.
Have a good day!  Michelle

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