I'll bet it doesn't work, also. And, I'm always worried about herbal supplements, in this case the valerian. Over the years, several of them have turned out to have bad effects. Ask your vet about melatonin, and see what he or she says. I know several people who have used it around here for noise sensitivity, and think it does make a difference.While shopping tonight, I found some supplements for dogs. They are distributed by a company called Pet Friendly and contain B Vitiamins, Folic Acid, Calcium, magnesium, valerian, passion flower, brewers yeast debittered and beef liver. I was wondering if anyone has tried anythins like this for seperation anxiety?[/b]