Here's a link to Maak for pets where you can get unbelievable discounts on flea treatments like promeris and top spot. I just paid $67 for 6 treatments for large dogs. I have been using their products for years, but this promotion is new, I'm supposed to get a discount for my referrals, too. There's supposed to be a discount code for you to get 20% off their prices. Let me know if it works.
http://maak4pets.anfr.me/Q4GFC7
http://maak4pets.anfr.me/Q4GFC7