FAQ - Get Rotation Right Facts

1. Know the Importance:

Internal parasites are the most common disease of horses today and are one of the most costly and damaging. Proper use of deworming agents on a regular schedule in combination with good environment management procedures is critical to relieving your horse of most parasites.

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2. Know the Enemy

These are the most significant internal parasites that affect horses:

  • Roundworms (Ascarids)
  • Botflies
  • Pinworms
  • Tapeworms
  • Large Strongyles
  • Small Strongyles

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3. Know the Symptoms

Your horse may exhibit any of these alone or in any combination:

  • Listlessness
  • Anorexia
  • Recurring Colic
  • Death
  • Weight Loss
  • Peripheral Edema (swelling)
  • Diarrhea

In less severe cases, your horse may exhibit decreased performance, poor food utilization, and a dull hair coat.

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4. Know the Weapons

All dewormer brands on the market fall into one of these classes:

  • Avermectin (ivermectin and moxidectin)
  • Benzimidazole (fenbendazole and oxibendazole)
  • Pyrantel salts
  • Praziquantel with avermectin

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5. Know the Facts About Resistance

Parasites are becoming resistant to all classes of dewormers due to overuse and misuse of chemical compounds, under dosing, and lack of awareness. No new class of dewormer has been released in over 25 years. Here are some facts:

  • Resistance develops when a small number of targeted parasites survive by avoiding treatment effects of a drug and then passing the ability to survive on to their offspring. This produces an increasing gene pool of resistant parasites with every successive treatment. Indiscriminate drug use "selects for" resistance.
  • Drug resistance among small strongyles has been reported since the late 1950s.
  • Drug resistance amoug equine parasites has been reported around the world and in all classes of dewormers.
  • Not a "single drug" or "one parasite" problem
    • FBZ resistant cyathostomes in North America (NA) & Europe
    • Moxidectin resistant ascarids in Europe & NA
    • Ivermectin resistant ascarids in Europe & NA
    • Pyrantel resistant ascarids & cyathostomes in Europe & NA
  • Ivermectin: Decreasing egg reappearance period (ERP) for cyathostomes – Is resistance brewing?

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6. Know How To Get Rotation Right

Getting Rotation Right is as easy as 1, 2, 3. The Right Dewormer for The Right Horse at The Right Time.

  1. The Right Horse: 20% of horses shed 80% of parasite eggs. So using the same deworming program on all horses means you may be wasting time and money, and you may be encouraging resistance to develop by over-treating horses that do not need it.
  2. The Right Dewormer: It's important to rotate between the three major chemical classes and use them at appropriate intervals based on the last drug used, time of year and your horse's innate susceptibility to parasites.
  3. The Right Time: Climate, pasture conditions, and exposure, as well as seasonal parasite activity will determine your timing. Check with your veterinarian to design the right program, or use the Safe-Guard Get Rotation Right Barn Chart as a guide.
  4. The Right Dose

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7. Know The Right Start

Small strongyles account for up to 90% of a horse’s worm burden, 75% of them may be encysted. The ingredient in Safe-Guard® Power-Dose® is the only one FDA approved to treat all stages of encysted small strongyles. Start every deworming program with Power-Dose®.

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8. Know the Rest of the Story

Steps to follow for an effective deworming program:

  1. Treat all horses on the farm at the same time, with the same product.
  2. A proper deworming schedule may require as many as 6 treatments a year for the most susceptible horses that are shedding the highest number of parasite eggs.
  3. Pay close attention to make sure you're administering the correct dose and that your horse actually swallows the full dose!
  4. Treat for encysted small strongyles with Safe-Guard® Power-Dose®.
    1. Once a year for all horses.
    2. All incoming horses.
    3. 10-14 days before performance event.
    4. Before starting horses on a daily dewormer such as Strongid® C.
  5. Treat for bots and tapeworms 1-2 times a year.
  6. Treat the environment.
    1. Pick up and dispose of manure regularly (ideally twice weekly).
    2. Do not feed from the ground.
    3. Do not overstock pastures.
    4. Rotate pastures when possible
    5. Mow and harrow pastures regularly.
  7. More deworming is not always better deworming. To make sure you are getting it right, monitor your program by having your veterinarian perform fecal egg counts.

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9. Know Rotation For Foals

The first application should take place as early as 8 weeks of age to help rid the foal of internal parasites and help prevent pasture contamination. Then begin rotating compound classes at regular intervals (>= 60 days). Be sure to select a dewormer approved for use on foals less than six months of age. Check the label for guidance, consult your local veterinarian for advice, or refer to the GRR Deworming Guide for Mares and Foals.

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