Agreed YES it handles both, which is what makes it such a great option, especially if you aren't sure what has your birds low. I read somewhere it is used for all kinds of animals, including people, who have parasitic conditions. I also read it's considered one of the safest drugs we know of, in the manner we consider penicillin so safe, as its made from a natural substance in Japan. I digress... anyway, we had tried EVERYTHING for our flock's leg mites. Everything! But the Ivermectin Pour On has made a noticeable difference in just a short time after the first application. I paid $18 for a smallish/medium size container at my local farm store.