 genetic drivers of what we think is accelerated aging in big dogs so that that's great for purebred dogs a lot of dogs have a mix there's a lot of mutts out there strider is what's called a carolina dog he's a shepherd mix with a chow tail kind of a mutt they do have a name they call them american dingoes you can there's a picture of strider on the website at the 1a.org so check him out he's gorgeous