I have been into the Corso's for over 8 years, I still two Corso's and co-own several more. When I first started researching the breed, I never found any undershot dogs, all the dogs I have seen in the past had minimal white. They had deep set eyes which did not potrude. Now I have seen undershot dogs, looking very bully, protruding eyes, Like a boxer, a large amount of white, ( dogo ). Whether american or european both sides have crossed dogs. I found that the past corso's of the U.S. had much more type and better working temp. We have to remember that this is a working breed. Sharp temps are welcomed and are needed for true working dogs.