Yes, John Sullivan sure has amazing BuckeyesI've seen like two pictures and he's gorgeous.
Yeah I've heard the more rare chickens are the less work is put into them so they are weaker. John Sullivan I believe (i think it was him) has Buckeyes and they are extremely disease resistant while the La Fleche, a breed that needs a more help, you go so much to sneeze in their direction and they've got something.