Ok, to me I think the all black presa is natural not a recent sign of crossing only because it is heavily documented that the great dane and 'ols style' pits were used in the re-creation. Ive seen some all black presas that look like presas as far as coat wise. As far as the all white, I heard something like their skin burns easily from the some, but would that be from lack of skin pigmentation or just the light coat? If from the light coat does the dogo argentino have the same problem? How about all white boxers, pits and other all whites? Touching back on coats when I first got my girl her coat was coarse (bree standard), but as I changed her diet her coat changed and even when I took her back to the breeder just to see her family the breeder commented on how she had never seen a presa's coat so soft and shiny. What do you think about that?