Compared to our prior drops, this has completely extinguished any signs of fleas. This is important to us because one of our kitties has a serious allergic reaction to flea bites. This has completely resolved the problem.
I actually use this for cats. The dog one has same active ingredient it's just twice as concentrated. Just needed to get the right dosage figured out. I like that it not only works on fleas, but also several kinds of mites and worms.
jana warmann
Jw
Good