My two cats that I had were taught that when I snapped at there ear & said a firm NO you do do not do that. After a short time all I had to do was put my hand in the position as if the snap was going to happen & they would back off. Once you snat the tip of the ear they shake there head as to what was that. Mine go to the point that if I showed the snap position the would bat there eyes as they backed off.