Mittens is on Revolution and my dog, Watson is on Comfortis and Interceptor (for flea prevention and heartwork prevention). I have ordered from 1800petmeds before and had no trouble with getting and using the product. I have heard that there are other online pharmacies that don't require a prescription to order the pet meds. Do any of you use an online pharmacy, if so which ones? My vet will not write out a prescription, so I am looking for one that I can get the Revolution and Interceptor especially. Thanks for your insight!