I have a dog, year and a half old chocolate lab, that has just been diagnosed with flea allergies. She bites all of her hair off. If she gets one flea, that's it, she bites and bites like crazy. Anyway, we are very aggressive with flea prevention. The last time we ordered the flea prevention from a company online. When I was at the vet to get her shot, the vet told me that the stuff that I've been getting is either not real or it's expired. Is that possible? They are the number one selling company online for this stuff. Wouldn't that be illegal? The commercials say their stuff is the exact same. Do you think that he just wanted me to buy it from him? 

That was great info. I did use the 1800 ped meds, actually. I won't anymore! Thanks so much again