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How to Tell if a Horse has Worms

Contributor
By Rebecca Boardman
eHow Contributing Writer
(3 Ratings)
Ascarids - YUCK!
Ascarids - YUCK!

Determining if your horse has worms is an easy and important step to maintaining their overall health.

Difficulty: Easy
Instructions

Things You'll Need:

  • Good eyes
  • A willingness to look at your horse's feces

    A Wormy Horse - Something you DON'T want

  1. Step 1

    Parasites and horses--a relationship that goes all the way back to the dawn of time. The fact is, you can never kill all the parasites in your horse. And really, you shouldn't. Killing them all is like going around with a can of disinfectant spraying every conceivable surface for contaminants. But yes, you must keep the parasite population down if you want your horse to be healthy. Verifying your horse has worms is easy enough; destroying them can be trickier. First, look at your horse's feces. This is often the easiest way. If you see anything that even remotely resembles a worm, no matter how small it is (and no, I am not talking about bits of hay--you can TELL if it is a worm), your horse is a nice reproduction factory for ascarids and strongyles.

  2. Step 2
    Bloated bellies with ribs showing - WORMS
    Bloated bellies with ribs showing - WORMS

    Another easy way to tell if a horse has worms is to look at its overall condition. Does its tummy appear bloated, yet there are ribs visible? Does it have a dull hair coat, sometimes with long hairs mixed in with the short--even though it's mid summer? These are prime examples of what a horse looks like with a heavy worm-load. The worms are getting all the horse's nutrition. The horse might be eating all the time, but half, if not more, of what it eats is feeding the worms.

  3. Step 3

    A guaranteed way to check on the worms in your horse is taking a fecal sample to the vet and asking them to do a fecal egg count. This will tell you how heavy a load of parasites your horse is carrying. Don't worry too much if your horse has some worms--that is normal--but too many is bad news.

  4. Step 4

    Where there is horse feces, there are worms. The feces carries the eggs, which hatch and then the larvae climb to the top of the grass stems and wait to be ingested--then the process begins all over again. Clean up your horses feces and compost it. The heat will kill the larvae. Some larvae can burrow into your horse's tissues and lie dormant for years; escaping your de-worming program. It is important to kill these by using special de-wormers that you can buy from your vet and off the market--just be very careful to follow label instructions.

  5. Step 5

    Worms are serious business, especially for young, old or sick horses. In the old days, when horses ranged all over for their food, they did not face such a health issue with worms, as the worm load was spread far and wide in the horse's manure, and a great many of the parasites died before being ingested on the grass by the horses. Now, we keep our animals penned up, and the worms get to reproduce like mad. In order to stay ahead of the game, it is important to keep your horses on a rotating de-worming schedule. Check with your local vet on the best program for your area.

Tips & Warnings
  • Be sure and contact your vet before you begin a de-worming program on a new horse. You will want to establish how much of a worm load it is carrying before you kill them off. Too many worms dying at the same time can cause a horse to colic.
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Comments  

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on 5/31/2009 have new horse and live 145 miles from nearest profesional vet . have seen small gnats and big green flies so far. are daily feed through wormers effective for all worms in northern calior should i do a rotating worming regiem?

rkboardman said

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on 6/26/2008 Hey Cheyenne, this is Rebecca. You need to worm him a full FIVE days with the Safeguard, then wait two weeks and worm him with Ivermectin. It will take some time for him to unload all his worms, and you may or may not see any worms. The ones you are most likely to see are small red ones about 1mm long in his feces. - Good luck!

cheyennee said

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on 6/21/2008 My horse has worms his belly is bloated but yet you can see ribs at the top. I have been worming him for two days like the vet said but no worms have came out. I use safeguard. What is wrong?

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