pretty much what amber said would be your only option to know what bloodline your dog is off of,but more than likely if your dog did not come with papers,hes just byb dog with unknown lineage,unless the breeder didn't want his name on dogs you would breed in the future. Thats what i would do,but i have a contract for mine,if you do not want to pay the price i want,ill offer you a lower price but you have to get the dog neutered/spayed within 6 months of age and no papers.I would aslo take the dog back if it does not get fixed,and its all legal.