Frontline:
Buy 3 get 1 FREE
OR
Buy 6 get 2 FREE
 
Advantage:
Buy 4 get 1 FREE
OR
 Buy 6 get 2 FREE

Revolution:
Buy 6 get 1 FREE
OR
Buy 10 get 2 FREE

Unsure about how to apply flea preventative to your pet? Click the link below to watch an informative how to video.
http://frontline.us.merial.com/prd_apply.asp