Boss, German Shepherd mixed with what?

by Brandy
(Missouri)

His name is Boss. I adopted him from the Human Society.

I have no idea what kind of German Shepherd mix he is.

His appetite is great! For exercise, he runs constantly.

I need to find out what mix he was bred with. He is 8 months old and weighs 25 lbs. He runs like a fox. He's got little feet, and a bushy tail. Pointy ears and long snout.