Ivomec is not licenced in the Uk for dogs, but if it is used no more than 0.2 of a mil should be used. I cringe when i hear of some of the huge doses given to dogs. A big lurcher won't need more than 1 mil, and its lethal stuff. If you don't fully understand the dosage required your best off not jabbing with the stuff. Try another method instead. I often think that Stronghold is the best, most safest method for your dog. Just buy a couple of pippettes and you're laughing, and without putting the dog at risk too.