I finally got around to consolidating all of Sawyers papers, so there not in various places. And while looking over some of the paperwork from when we got him, it says ACA registered. For some reason when we got him I thought they said AKC registered, but who knows as that was almost a year ago. Ive definitely heard of the AKC/KC but never the ACA. What is it exactly, and how is it different from the AKC?