Veterinarians want to appear as casual with your pet as you may be. However, when any of us needs to administer meds or handle a kitty for treatment, we require the cat to stay in one location. We and most veterinarians as well as shelter, breeder and cat handlers use the "Scruff" technique. It appears here. Obviously the arrows lead to scruffer and scruffee. You must believe that it is really vital to establish the ground rules so that the real scruffee ( the feline) receives the meds or treatment consistently.