Mitch, I am feeding the Nutri Source Salmon. They said fish was really easy to digest. She took to it right away. I just recently bought the lamb but havent fed it yet. I know lamb is described as one of the "hot" meats but that is not necessarily a bad thing. So much controversy and this is good, this is bad, yada yada. I think you just need to find a quality dog food that she can tolerate and works for you.
I was happy with Dick Van Pattens food and it gets good reviews but wanted to go grain free due to the allergy issues. I tried the Sweet potato and duck and she wouldnt have a thing to do with it. I wouldnt buy my food from a vet either. Heck most MD's dont know squat about nutrition so I am sure it is the same in the veterinary world. AND they want an arm and a leg for it......mine!!!
Ask at any reputable pet store (family owned is better in my opinion than PetSmart or Petco, they dont know much really) for free samples. I came home with 10 bags of various samples. Core Wellness sample was a good kind too that my dog liked. The manufacturers give them samples for you to try and they are individually packaged. ASK.
karen