Here are the results of a recent parasite/deworming study performed in the Northwest Arkansas region by Dr. Yazwinski at U Of A with NWES. The results confirm a trend in adult horses for the southeast US: *fenbendazole(Panacur) at double dose is not consistently effective
*moxidectin(Quest) and Pyrantel(Strongid) are consistently effective
I do not recommend fenbendazole(Panacur) in adult horses for a routine deworming rotation. It is best to use moxidectin(Quest), pyrantel(Strongid) or ivermectin based on fecal egg counts. Without fecal egg counts, I recommend deworming twice annually: late fall(Nov) and spring(April). For fecal egg counts and recommendations on your deworming program, contact our office.