Henderson Animal Care Hospital

PO Box 1987
Henderson, TX 75653



Deworming recommendations

Several deworming protocols exist for horses.  We have listed a few guidelines here, but each individual horse and location will determine which protocol is best.  For instance, horses who live on pasture need to be dewormed differently than horses who live in a stall most of the time with limited turn out.

The first thing to determine when you are deworming your horse is which horse is carrying the most worm burden.  If you only have one horse, this is easy.  If you have 5-10 horses, usually one to two horses carry 90% of the worm eggs and are considered carriers.  You need to visit your veterinarian for fecal examinations for each horse in order to determine who is carrying the highest burden of worms.  Your veterinarian will be able to determine how many eggs are present in each fecal sample, and will thus tell you which horse is the culprit.  We recommend using a power pack on the horses with the highest amount of worm burden.  This will rid the horse of all adult worms, larvae, eggs, and will also rid the horse of encysted larvae.


Next, depending on the time of year, your veterinarian may recommend you deworm your horse with a combination of ivermectin and praziquantel. Praziquantel is effective against tapeworms.  For the low burden horses, they may only need to be dewormed with this protocol twice a year (spring and fall). 


"Tube worming" was very popular years ago.  Some owners currently want their horses "tube wormed," however, with the current medications used today, tube worming is not necessary.


Also, a daily dewormer is also available.  These dewormers work well in your horses with low worm burdens.  For your heavy burden horses, a daily wormer is not recommended.  These are just a few guidelines and visiting with your veterinarian about the best protocol for your situation.