thehorse.com June 29, 2015
Traditional parasite control programs involved rotating dewormers with a number of different products at regular intervals. At that time, most horse owners were concerned about Strongylus vulgaris (large strongyle bloodworm).
Thanks to that traditional approach, S. vulgaris infections don’t occur very often. The two-month schedule associated with rotational deworming worked well on strongyle eggs because it takes about that amount of time for reappearance after treatment.