Where is the cheapest place online to buy flea preventative like Frontline and Advantage/Advantix?

http://www.petsuppliesdelivered.com/single_product_display.cfm?id=10500

I buy the 89-132 lb dose and split it between 2 large adult dogs. I order it in the 6 month supply

For puppies under a year old, I would stick to the correct dose per pounds your youngster is.

Frontline, free shipping on orders of $120.00, beats
out the prices I have seen. Margret is a Bouvier Breeder and is not part of the HSUS.

http://humanesociety-inverness.com/frontline.htm