totally
and when you take him out have him on a long line if he trys to run he cant,
stand on the end when a dog comes along and DONT make a fuss when he trys to hide and run just stand there talking to the other owner take no notice of what your dog is doing.
then take hold of the line say good boy and walk off

i walk a dog sam was like it he used to try and hide within a few weeks he was fine wouldnt know he was like it