Interested to see if anyone has opinions on what bloodline this dog might be from. I know he is about 100 pounds and quite tall. Also interested in a general opinions on the difference in the working line german shepherds.
There is no real way of knowing from a picture. I remember seeing a pic of a sable dog that had the conformation of West German working lines, but the pedigree showed nothing but BYB pet dogs of all sorts of color and shape going back many, many generations - the only consistent link being the dominant sable colour being passed down.
Do you have any history or background on this dog?