I have used JulieR 's method successfully on my rescued German Shepherd after trying the drugs, and restricting him to his kennel. The only difference in her method and mine is I put his leash on him and issue a sharp correction just as if he were misbehaving in some other manner should he start to act nervous. Remember dogs are not human and they can only focus on one thing at a time. The most important point is to only give affection to any dog when the dog is doing something you want it to do. It is also a good idea to try to make the dog tired before the storm, a good game of ball or a long walk helps my guy a great deal.