Frontline Top Spot for Dogs 0-22 lbs, Orange, 3 Pack (1010185)
Frontline Top Spot for Dogs 0-22 lbs, 3 Month (Orange) provides up to four weeks of protection against ticks and fleas. Because Frontline pet meds are waterproof, your pet won't lose the protection offered by Frontline Top Spot.
Had to use this twice.
I have been using Frontline for eons without a problem. Now suddenly it stopped working too soon and I had to use it again just two weeks later. Then, my dog got some fleas because it was not working and even the second dose did not work very well. My vet said the product did not change but that sometimes animals that have been using it a long time because tolerant to it or something.