Thank you so much for the responses. As some of your tips about using larger dogs to use small drops, for instance - one on ferret, etc. I am like, "Duh me, why didn't I think of that?" Last time I checked in ordering Revolution, they were often sold out or restricted to veterinary. I just checked 2 places online and I found they are now stocked. Am getting orders in for more. Thank you! April [Posted in FML 7914]