Dear Murray: >The stated dose was 0.4ml per 1kg body weight so I rounded it off on the >higher, not the lower. For example: for a .800gm ferret the dose worked >out to be 0.32 ml. I gave 0.35. For the males I went up a touch more for >example a 1.350kg ferret got 0.60ml rather than 0.54. It certainly didn't >cause any strange effects on these two ferrets. The dosage for ivermectin is 0.4 mg/kg body weight. Which works if your particular solution is of a concentration of 1 mg/ml - do you know the concentration of the product that you are using in mg/ml? It's probably 1 mg/ml, but sometimes we see people using higher concentrations so they don't have to administer as much.... With kindest regards, Bruce Williams, DVM [Posted in FML issue 3329]