we use frontline but i really don't like that
neither - frontline/frontline plus - kill or repel mosquitoes which is something we really need here in the south this time of the year! the only products that say they do are:
bio spot (already knew to stay away from that one!

)
k9 advantix and
sentry pro - this one i have not heard about.
i had asked on another thread about the Zema flea and tick drops but no one seems to know anything about this product. i was interested because it has a lower dosage of the chemicals in it.