Hi there,
I don't think I'd go as far as taking my word as law lol but, to answer your question.....no, the Bulldog does not have a locking jaw although many tend to think they do since they were originally used for bullbaiting but it is simply their tenacity and ability to breathe well in close quarters ( short nose ) that allows them to hold on.
Their jaw strength is VERY impressive and was welll matched for the job they had.
