Dear Elvis and Ozzie, According to my vet, mites can be unseen -- they get down into the skin. At least 3 rounds of Ivermectin every 2 wheeks. I've had a time with mites this year. shudder!! Charlie, Jolly Rodent ************************************** Get a sneak peek of the all-new AOL at http://discover.aol.com/memed/aolcom30tour