“Supreme Greyline” is a term I came up with to describe the more bully strand of Greyline. OG Greyline is the primary bloodline I use in my breeding program with several different bully lines used as an outcross. The signature Greyline look is a short muzzle, a large square head and wide shoulders & chest. Other bully style bloodlines are used to enchance and modify the signature features in Greyline. Our goal is to produce a physical correct and mentally sound bully that will be the ultimate family companion.