| All Rotties originated from Germany, but your question could mean a couple of things. Here are some answers:
American line - Rottweilers bred in the US with American bred ancestors up to some generations. Or it could mean that the puppies were bred for AKC style conformation competition.
German line - Rottweilers bred in Germany or whose parents were imported from Germany. It could also mean that the puppies were bred for German style Sieger, or SCH competition.
If you want a brief history of AKC dogs in America, you could read the book of Mrs. Klem. |