Deworming Your Horse
More than 150 parasites infect horses through soil, water, and flies. Among the most troublesome are large and small strongyles, bots, roundworms, threadworms, tapeworms, pinworms, and lungworms.
For most horses, parasites are not a token problem, but a serious problem that can cause anemia, colic, coughing, wheezing, poor hair coat, and poor performance. In addition, horses with parasites cost more to feed than horses without parasites.
Horse wormers (equine wormers) are provided in plastic syringes for easy dosing. Wormers are also available as granules that are added to your horse's food daily. Unfortunately, there has been an increase in resistance to daily granule wormers, and it appears that horses on daily wormers do not have the same stimulus to develop parasite resistance as do horses that are wormed every 2-3 months.