I've read everything I can get my hands on about GSD ears and taping etc. I've never had to do it but I've come to the realization that there is no way to prove or disprove that taping actually works. Unless someone were to tape one ear and not the other would there be any way of telling whether or not the ears would have stood up on their own if the taped ear remained up and the untaped didn't. Technically that would be inconclusive too. Sometimes one ear will stand and not the other. One could say they simply taped the one that was going to stand anyway. Maybe somebody has done this as a test but I'm not aware of it. I'm in the camp that believes genetics controls the show. They're either gonna stand up on their own or not at all.