I'm still in the process of looking this up. But in a short reply from the New Jersey, they indicated that my definition of birddogging was stepping on the activities of a real-estate broker which requires a license.
My definition of birddogging was both/either
1) Merely finding information and presenting a possible deal to an investor with a finder's fee contingent on the closing of the deal
2) Or finding a property and representing the seller in a short sale and then finding an investor to buy and taking a fee upon close of the sale
-- not sure if that is what other birddogs are doing, but from what I read, these two options seem to be the majority of the activities --
I am currently requesting a copy of the State of New Jersey's real estate commission's guidelines and regulations on paper so i can read through it a bit more.
(BTW I am NOT an attorney, so don't take anything I type in here to be legal advice, i'm just giving whatever information i can find because of my own interest in this)