Ok, I'm going to give you all a secret my vet shared with me. I have 8 dogs & 6 cats so you can imagine what it would cost me if I had to buy Frontline for each & every animal. Frontline for a 6 lb dog & a 100 lb dog cost relatively the same price (which is shameful) but, obviously, you get a LOT less product with the smaller dog package than you would with the biggest dog package. Here's what you do ---
The first, fipronil, kills adult fleas and ticks
Buy Frontline Plus Dogs - Cheapest Frontline ..
Frontline Plus for Small Dogs up to 22lbs (Orange)