hi there gsdog2
here is another site that may be able to help you www.dogschool.com.au have a look at the site and give craig a call.im sure he would be more than help full with your problem.He isnt a vet but has a very large knowledge on animal behavior and is very experienced when it comes to training a dog. i have been dealing with craig for many of years and seems to get the best out of my working dogs every time.