HELP!!! Naso Tang just won't eat, getting worried

[my2rotties]

Well I was about to lose all hope for this fish, but she is nibbling at the nori I have been putting out for her. She is not eating very much of it, but she is eating something!!! I had the option of bringing her back to the LFS to get another one, but I didn't want to do that to her. I felt that bringing her back would stress her out way too much. I know she cost some money, but she is our pet and I wanted to chance it. It seems that she likes the new rabbitfish and was watching her eat.

Hopefully just picking at the nori will turn into feeding shortly. She is dreadfully skinny so I know we are not out of danger just yet. Thanks for all the advise everyone.