Which is the least toxic for the best results. Not a huge infestation...have seen 3 fleas, and I'm sure there are more. Ugh.

There is SO MANY variables.

I love Frontline Plus. My property is heavy in ticks, and I can pick 10-15 or more off my dogs or me every day during certain periods. I have never seen a flea, despite working for vets, kennels and being outside 90% of my life. A majority of people will say that Frontline does not work anymore. Does for me!

here Frontline Plus is really not working anymore.
I have to use Advantage II and spray with Adams when the dogs come out of out the woods.
Cant use Advantix due to cats being near and around dogs.