there have been english bull terrier crossing fact some research has lead me to believe that some of are apbts started from the birst colored english bull terrier crosses although most were show dogs some were used also look at ch phyco and them dogs they had english bull and staff cull hard with anything really wich most cant do and you will get good dogs because of the hybrid vigor crossing any two breeds u get freaks sometimes that are Superior also it was said walter kominsiski had crossed n bull terrier as well for the hybrid vigor would be my guess as to why