I Use it and LOVE IT.. I even drink it..
not the doggy one the human grade..LOL and yes it works.. I use it in my yard and around my son's Alaskan malamute kennel, to keep the flies and bugs out. for the dogs I take some in my hand and rub it in the fur I do it out in the yard so when they shake we don't inhale it. I had not have a flea problem since I started using it 3 years or so ago.
hugs,
cArmen in nj