My dog seems afraid of German Shepards. Adult or pups. He goes into a whimpering, growling and barking frenzy as soon as he notices one. Especially if it looks his way. He is perfectly fine with other dogs unless they growl at him and wind him up then he gets a little growly. Is there any way I can teach him that German Shepards are not a threat from a distance? I have nobody who owns one who can help me with socialising him with them at the moment, but there is often a few about on a walk.