Yeah I know to only use the food-grade, I'm still trying to figure out who carries it. I'm not even positive that it is fleas, actually. I've been waking up the past few nights with little red bites that look exactly like flea bites, but neither my bf, who shares the same bed, nor the cat nor the dog have been experiencing any kind of bites or itching. It's just me. And the dog is on Frontline Plus, the cat's about to be put on Frontline...I'm at a total loss as to what this could be if it's not fleas.