We have a collie/greyhound 8 year old dog. He has been to numerous behavior classes through the years. He is a very good dogs, but the problem is he barks at everything or nothing. If a leaf blows or the ups truck goes by. We have tried everything to calm him down and nothing works. He scares people walking by because his fur stands up and he really looks mean, but really isn't. He also does not get along with other dogs.
Any body have any ideas

pem850