Showline gsds

This has been brought up before I know but someone was asking about the mechanics of why they move like that. Why exactly does the sloped back and legs cause them to move like this:
YouTube – Grupo Vegas Sieger 2008 ini

Your Dog’s REAL Age Isn’t What You Think It Is

If you’d like to find out how old your dog really is in human years (and why it’s important): Click here to learn more »