Contrary to popular belief, many horses that have dangerous parasite levels appear to be perfectly healthy. It's safe to assume your horse has worms.
The only way to be sure about the degree of infestation is to have your veterinarian perform a fecal laboratory examination . Some horses, particularly young ones, do show obvious signs of carrying a heavy worm load.
Symptoms may include:
Descriptions of each therapy, how they work and what health benefits they can bring to dogs and horses
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Dr R MacVicar
Dr J G O'Rourke
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There are many safe, convenient products available today. Consult your veterinarian to set up the best program for your situation. A minimum deworming schedule is twice a year, but more frequent deworming is called for in many situations.
Deworming medication for horses comes in three formats. Most people today use paste dewormers which come already packaged in an easy-to-use oral syringe. You can buy them at most tack and feed stores. You can also buy dewormer as a feed additive. Veterinarians sometimes administer liquid dewormer by stomach tube.