Thanks so much for the great information, Kelly. I'll be looking for Advion and Topchoice as well as for Frontline. Incidentally, Kelly is a ligitimate guy's name down here (Kellie = female). I do have to admit that after reading and chuckling over the posts concerning the question of your gender, I did consider addressing my original post to Ms. Kelly. I decided against it when I figured that it was now getting just too well worn. That stuff is good only when the victim can't see it coming.