When testing a dose of 1 mg/kg BW of IVM for the deworming of naturally parasitized foals, a 100% FECR was obtained for the ascarids, cyathostomins, and pinworms 4 to 8 days after the treatment, resembling the efficacy of this dosage [17,18]. A significant increase in erythrocytes, hemoglobin, and packed cell volume after the pour-on application of this dosage to horses naturally infected with cyathostomin has been previously reported [5], and a period of egg reappearance of 7 weeks has also been reported, which highlights the success of this formulation.