What does your breeder recommend? The general practice here is not to feed a Newf puppy food but to go for an all-life-stages food. There are many, many threads in this forum that discuss the whys and the levels of protein and the calcium/phosphorus ratio needed for a pup - definitely do some reading.
Also, right now today I would not choose a BB product if I was not already feeding it, due to this:
http://www.newf.net/Forums/showthread.php?t=106306 IMO the company's reaction is underwhelming and I hope that they come around and treat it more seriously in the days/weeks to come...but it would not be my choice for a new pup today.
Good luck and do you have your pup yet? How old?