| http://www.w3.org/ns/prov#value | - TwisterRush 11-03-2009 07:52 PM my horses are done every 6 weeks. it also depends where you live, how old your horses are etc.. here is an article you might find useful : WikiAnswers - How often do you have to de-worm a horse Ryle 11-03-2009 07:57 PM For 40 years now, veterinarians have recommended that horses be dewormed every 8 weeks all year round and rotation of dewormers has been recommended
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