For the last year I've been using either frontline plus or K9 advantix for Niki (depending on what was available). Now I'm considering buying a stock for 12-18 month. Looking for a products I discovered that there are 2 K9 Advantix's: one is the blue one (K9 Advantix flea, tick and mosquito protection for dogs) and the second one is "K9 Advantix 100) (Bayer K9 Advantix 100 (Over 55-lbs) | PetFoodDirect.com).
Does someone know what's the deal with that?
Evgeny & Niki