I was looking for a six month supply of Frontline Plus flea control from my 6 month old Golden Retriever. He is in the 45-88 lbs category. So far, my vet has quoted me something ridiculously high ($92.00!!!!) and through briefly shopping around online, I found something close to $50. I was wondering if anybody has a place that beats that? Some place reputable with cheap shipping... I don't think it will be a problem to get a perscription from my vet. So PLEASE fill me in.