How do you know what type of line?
I was wondering how you know what type of line a dog is based on its pedigree? I'm new to all this - when I was a kid we had a few shepherds (back in the 80's and 90's) and I don't remember there being different lines back then. Or at least it wasn't as big a deal. How can you look at a pedigree and know whether a dog is ASL, WGSL, WGWL, DDR, etc?