I have a two-year old Jack Russell, Maddi, and until recently, we had a large German-Shepherd mix dog that lived outside, Jingle Bell. Being outside, Jingle was very prone to fleas, and we would give her and Maddi Frontline or other types of flea medicines that had to be applied to the fur. They worked, but not as well as we wanted. At a recent vet visit, we discovered a new type of flea and tick repellent called Comfortis. It is a pill that you give your dogs or cats once a month. We bought it, tried it, and are never going back to applied flea medicines. Within 30 minutes of having swallowed the pill, you could see the fleas leaping off of Maddi in every direction possible. We had to take her outside for about 30 minutes so that the fleas would not get in our house. This pill also worked for our big dog, who has the run of the yard and surrounding woods. I highly suggest it for anyone who has flea problems.