Like Mojo, I've had GSDs for the better part of 30 years. Some are easy, some are not. Only with the latest I've found that a stronger hand is required. She was crazy, nutty, over-enthusiastic, didn't know her own strength, nippy, whirling dirvish on a leash, you get the picture. The only thing that worked with her was overpowering with strength - and it didn't take long. Left hand on the collar, right hand on the shoulders, push her to the floor and pin her there till she calmed down. No hitting, no pain, no abuse, just "I'm in charge here and I'm bigger than you". Only had to do that for about 3 weeks. And after 2 years, she still army-crawls to the front door when we come home - squinty eyes and all. Not saying it will work, but like kids, you sometimes have to adjust your methods to achieve the desired result.
June
June