Worming Your Horse
The Importance of Protecting Your Horse from Parasites
Horses have worms. All of them do. The good news is they can be kept under control with proper management. Manure removal, practicing good sanitation measures, bot egg removal, and keeping to a regular deworming schedule are a must. Not doing so can take a staggering toll on a horse's health, even death.
Good programs should include deworming for strongles (bloodworms), ascarida (roundworms), Oxyuris equi (pinworms), and Gasterophilus (bots). Using paste wormers, adult horses should be wormed every 6 weeks but not to go longer than 2 months YEAR ROUND. For foals, from one month of age every month until they are weaned, then every 6 weeks until they are 1 year old. After 1 year follow the adult program. Pregnant mares should follow the adult program until 1 month from due date, at that time they should be wormed with an ivermectin product, and again with an ivermectin product the day she foals. If you are feeding a daily wormer, check with your veterinarian to make sure if any adjustments might be needed for your area.
Using something effective against all worms and bots such as an ivermectin
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