Hi Guys. As I'm new to GSD world. I feel pretty confused about working line dog or show dog. For instance, If I'm looking for a good guard dog and a good companion, which line am I supposed to pick? What are these terms for? Like west german lines, checzh lines, east german lines, american lines, show lines. As fas as I understand, best companion dogs are showline dogs right, if I'm wrong please correct me. I know lots of GSD people extremely familiar with these terms, but people like me, new comers aren't I guess. Would someone help me to understand these terms and how these effect to pick a puppy? Thanks.