HI! My family and I recently rescued a GDS from a family that could not take care of him. He is about 3 years old and is pretty much a good dog all around. The main issue we seem to be having is him barking at other dogs during walks. His barks are non aggressive. It starts with a whine and then quiet barking and then really loud barking. We are trying to correct it by saying no and getting his focus off of the other dog. He also does it while in the backyard and wont if we are out there playing with him. We aren't sure what to do next. He wasn't socialized much in his previous home so we would like to start that but not sure how to start. Any advice is much appreciated.