I think a few of my birds have worms, and even if they don't it wouldn't hurt to worm them. I've been doing some reading and read that if you have a heavy infestation you should start with something like piperazine because it isn't as strong. About a week later you start with the Ivomec Eprinex. So my questions are, how do you apply these two wormers? In the water? Onto their skin? What else does it kill (mites, lice?) Thanks in advance!