Skiploder, as always, provided a very informative post that I think answered this question,
but remember, a nutritionist is someone who can go out and certify themselves and may not be very educated. A registered dietitian is someone who has had at least a bachelors and often masters degree, along with a dietetic internship, and they must get continuing education credits. THIS is the nutrition professional you want to listen toI will be one soon.
I feed live, nothing wrong with it. I think there are some very informative posts already so I will not repeat why I do so.