I agree 100% with AShoofly!! DO NOT be giving anything to your dog that has been prescribed for a HORSE! Unless your dog is the size of a horse and has the same genetic make-up you are foolish to even think of it. Different chemicals are used in different species, and the AMOUNT you would give a horse could not safely be adjusted down for a dog. Please, buy a dewormer formulated for a dog's system, not a horse's!