It really sounds like you are doing all of the right things for her. I would definitely be interested to know what the nutritionist says. I have learned from this forum that some pups are super picky and people go thru food after food until hitting on the one the pup likes. Yes, it's kind of throwing money around to buy a food and discover it isn't working, but maybe you can ask a store or even the companies that make the foods for samples. I have heard some will do this.
Have you tried Fromm or Canine Caviar? There is another one that is popular (well, Mandie loves Blue Buffalo..have you tried that?)..that isn't the one I'm thinking of though. I think it starts with an O.
Check out the Diet and Health section and search foods. It's a hot topic around here as we all have our own beliefs on what is best. But for your baby...what is best is what she will eat
Praying the Nutritionist can help. Please do keep us posted.