Read more about how Business Insider Reviews tests and researches pet products. Our top picks for the best flea and tick treatments for dogs Best ... K9 Advantix II over Frontline because of ...

4-dose flea and lice treatment for extra-large dogs over 55 pounds Advantage II dog flea treatment works through contact, so fleas don't have to bite your dog to die Effective dog flea treatment ...

We independently review everything we recommend ... the combination treatments we looked at. Frontline Plus Flea and Tick Spot Treatment for Medium Dogs is less expensive than most of our picks ...