Some people may disagree with me. Sounds like he wants to be in charge, and is teritorial.
My female is also an Alfa and I correct her with a corrective collar that has vibrate. Using shock on a bulldog could kill, so vibrate gets my bulldog's attention.
When he starts to growl it could be territorial so you should start the training with you. Tell him no if he persist the vibrate will break him out of his trans.