[Chip's Mom]

I am with the understanding that you can use Frontline plus on a monthly basis also. I used it 3 months in a row on Chip and finally got rid of that one or 2 fleas he kept picking up. Last month on my vet's recommendation I changed to the next weight level and finally got rid of the invisible flea that drove him crazy itching. Hopefully now I won't have to use it until spring.