You mean this one? This was a big deal in the early years of this breed. They got around it by saying it was the "silver" or "Grey" brindle described in the standard. This it the true "silver/grey"brindle (the adult) One of the DCCA's early club members had a dog out of Arbaco as her first presa. Then she made a trip to the Islands for the annual Monographica, and showed them a picture of him and of Arbaco. They couldn't stop laughing. However, since Arbaco's owner, Mac Harris was the first to register his dog with AKC-FSS, he pretty much got to submit his standard including acceptable colors (several of which are wrong/unacceptable if you look on the AKC site). He was also one of the first dogs to achieve a Championship under american judges who didn't know any better, so if he is a Ch he must be good right? Anyway, he is one of the things the DCCA club was founded to fight against, and in this day and age the only ones supporting him and that coloring are people who #1 can't let go of their bloodlines off of him cause it would make them admit they're wrong or #2 the uneducated. A couple of years ago I met a Cane/presa breeder from Germany. She told me the blue dogs were still a big problem in Germany.