I wont use anything but revolution & I get it here
http://www.deadfleaz.com but they also have all the other top flea products. I like revolution because it takes care of heartworms, earmites, mange mites. You dont have to worry about that. Which you really dont til your dog gets it then you're like Oh Crap
. And its really horrible for the dog to suffer w/fleas, mites & parasites. I think its $27 for a 3 pk on this site. Their shipping is only $6.95. I have never had a prob & have ordered many times.