[BostonRott]

The answer to "then what" is "drive yourself to the emergency room" because most likely you're going to need that bite checked out.

Aggression is NOT best treated with more aggression and by whacking them on the nose with a wooden dowel you're going to take a simmering pot and push it immediately to a full boil.

I would STRONGLY suggest a new trainer if this represents the extent of this person's knowledge.

Having had 2 sets of bitches who wanted to kill each other, and having tried to do some desensitization work with little success, I can tell you that you'd NEVER get so far as to have them that close. The posturing and stiffness/hackling will start LONG before you get them "nose to nose."

Keep the dogs apart.