co-op and tractor supply and feed stores carry ivermectin as well. The ivermectin (injectable) is the easiest way to take it mixed with a drink. 1 ml per 110 lbs of body weight, use a needle syringe and withdraw proper amount, mix with your favorite beverage, bingo. Ivermectin is ivermectin, regardless of where you buy it, just like tylenol is tylenol.