Thanks for your reply. I thought about putting her back on Eukanuba, but am worried if the vet is adamant on her eating the IVet that I would be doing her wrong in some way. Or not feeding her the "best" in his professional opinion. Which I guess doesn't really matter at the end of the day if she doesn't like it very much.
When I asked him about this, he said she would eventually come around if that is her only choice. Well, she hasn't really, so I have a decison to make.