I had been using Advantix for years on my past dogs, then on Molly when I got her, but I noticed it was only lasting for about 2 1/2 weeks! I changed to Comfortis and it seems to be working! Of course, here in Calif. fleas are bad and all year long!
Keep in mind that fleas don't spend their life on a dog, they feed, then just jump back off into the environment! To get rid of them you have to treat your home, your yard, and your Dog! EVIL creatures! Don't know why God invented them LOL!!!!!
I pledge allegience to Ms Royalty
In the United States of her kingdom
And to her rules for which it stands
One Princess under God
In the visible
With diamonds and bones for ALL