I have been feeding Flint River Ranch, that I buy from www.littleshopofterrors.citymax.com for about 8 years now.  Regardless of the fact that my dogs did great on the food and look the same, I was considering changing foods due to the fact that all super premium foods are so expensive.  Especially when you have mulitple dogs.  I am now SO glad that I have not done so.  Flint River has not changed formulas since its first bag sold.  I trust that they will continue to provide me with a quality food that I can trust.  They use no wheat gluten and do not outsource ingredients.