Hello, my name is Crystal and I am very new to the dog breeding thing. I haven't started breeding, but plan to next year. I just bought a pure breed rottweiler and his name is Thor. He is such a cutie. Thor's mom and dad are both CKC registered and dad is AKC registered. If i plan on breeding Thor, do i need to have the registered papers for the parents? I'm so clueless, please help! Any useful advice that you could offer would be greatly appreciated!! Thanks, and look forward to meeting you all!!! 