An article written by Susan Brown DVM, concerning flea and tick prevention in ferrets http://www.veterinarypartner.com/Content.plx?P=A&S=0&C=0&A=492. This article does not cover Revolution which is also highly effective against fleas, ticks, ear mites, and heart worm. I use Frontline Spray right now, and will be switching to Revolution when I am out of Frontline. Gerald, Macy, Rambo, Diesel, Pepsi, Bitsy, Betty Boop, and Tepney [Posted in FML 6412]