Thank you all for responding.
My concern with Orijen is the high protein content as I've read that Greyhounds should have a lower protein diet.
I have only tried the lamb variety of Taste of the Wild. She has been on each type of food for several months and I have done a slow transition to all the foods I have tried.
I am now considering a raw or homemade diet, but there is so much information and more opinion out there both for and against that it's hard to make an informed decision.
Cost isn't an issue, I'd rather have her healthy and happy than save a few dollars.