ummm, how dumb do you think doctors are? Wait dont answer that! Doc talking, "so you have been overcharging me for this by how much these past many years, and charging me a restocking fee, and then leaving me out to dry and now you want me to rock my boat again to stock yet another product I really don't want to carry. Hmmmm, I know...if your stuff is so good I will carry it but you need to buy back all my trifexis and comfortis and revolution and if your product does all that and more, oh, yea also buy back my heartguard, iverhart and I can stock just one item.....Yes I am sold! Thank to this wonderful company that really does have my interest at heart."