Readers Split Between Rotation and Fecal Egg Counts

More than 510 readers of TheHorse.com responded to a poll asking, "What drives your deworming product selection decision?"

results of poll on deworming products

Results were as follows:

  • Strategic rotation of chemical classes: 38.01%
  • Fecal exam results: 27.49%
  • My veterinarian's recommendation: 23.00%
  • What I've always used: 9.75%
  • My stable manager's recommendation: 1.36%
  • What my neighbor/friend is using: 0.39%

Readers tell what drives their deworming decisions in the comments below.

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  • if it works why change?
  • It is imperative to change the base anelminthic periodically to break the resistance cycle.
  • New deworming protocol based on FEC's results and our vet's are recommending for our area.
  • I have used daily wormer with 2x Ivermectin or Quest for many years with no colics or problems
  • Non-toxic proven herbal approaches
  • We try to use dewormer as little as possible. Once horses tested with 0 eggs.
  • Egg counts every 3 months
  • cost & rotation.
  • Vet recommendation based on fecal exam.
  • Even when his fecal egg count is 0, I still had to worm them before they could go out to pasture.
  • Plus tapeworm deworming 2x year as in the Midwest it is highly serologically prevelant
  • I do my own FEC's and for my friends.
  • Switch between ivermectin, pyrantel pamoate, and oxibendazol/fenbendazole.
  • daily dewormer with 2x yearly with ivermectin/praz. Fecal yearly to check worm load
  • I opt to rotate the medications along with the time of year and the presence of threat factors.
  • fecal exams are the first resort.
  • I would have picked both vet recommendation and the rotation of chemical classes.
  • My vet designed a flow chart for FECs and appropriate treatments for high, moderate & low shedders
  • fecal exam plus personal experiance with the horses.
  • ROTATION
  • 15$ a pop for a fecal + dewormer costs? = more monry than I want to spend.
  • Fecal exam only- why worm for worms they don't have or if they don't need it?
  • i use the information from The Horse Web site
  • fecal tests on myhorses are usually negitive
  • Ivermectin mostly
  • love the what I've alwas used LOL doesn't cover the mix of strategic, chemical and natural that Iuse
  • I have switched to natural non-chemical dewormer
  • Then discussions with the vet
  • My vet recommends a rotation and does fecals twice a year.
  • My vet says to follow Pfizer's Horse ID program so that is what I do.
  • We do our own fecal egg counts and just use chemical wormer on those who have a high egg count
  • Every third month I ratate the chemical classes of dewormers.
  • wormer that works, and price of wormer
  • I deworm a closed herd, and for parasites in my locale
  • I use a natural dewormer to stop the resistance in worms and it is better for my horses.
  • I use DE and Sulphur on a daily basis for parasite control.
  • based on my own research and vet reommendation
  • we have a basically closed herd. Price drives selection of brand. Worm twice annually, moxidectin/iv
  • Worms must be targeted to their lifecycle and use products accordingly.
  • I do not rotate -- using ivermectin + PQ
  • Plus apple flavor so it's not a fight.
  • None of the above; I use what is most effective at killing the most species, in conjunction with FEC
  • I've put a lot of thought into this subject, and decided to rotate the chemical classes
  • I always have a fecal run before I use any dewormer
  • I rotate according to seasons and species of worm using herbal formulas if possible.
  • Get fecal exams minimum of twice a year
  • This winter, I switched to a daily feed-thru wormer, with Ivermectic 2-3 times per year-great result
  • what is on sale
  • I use rotating wormer from VAlley Vet Supply.
  • rotation based on the life cycle of specific parasites
  • Ivermectin and Quest
  • I rotate wormers 4 times a year and worm specific in specific months.
  • Our mules test very healthy, they are shiny with great endurance, our vet is pleased.
  • Rotation of chemical classes along with discussions with my vet
  • price
  • 4 fecals per year (done at home) with mandatory treatment for tapes/bots. I seldom need to worm now
  • SINGLE HORSE OWNER IN AZ. I DEWORM 4X PER YEAR.
  • Fecal tests help determine the need to worm & the target species.
  • My barn manager has a set deworming schedule, but it works for my horse.
  • My own research into products

About the Author

Megan Arszman

Megan Arszman received a Bachelor of Science In print journalism and equine science from Murray State University in Murray, Ky., and loves combining her love of horses, photography, and writing. In her “free time,” when she’s not busy working as a horse show secretary or riding her American Quarter Horses on her parents’ Indiana farm, she’s training and competing her Pembroke Welsh Corgi and Swedish Vallhund in dog agility and running.

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