I've been feeding my quadpawds Honest Kitchen, plus a frozen raw, plus Wysong Au Jus, plus my "soup for dogs", plus raw meat (not all at once, obviously).  I've got a golden with dietary sensitivities and a part golden who has a cast iron stomach, however with the odds too much in favor of goldens developing cancer, I've decided not to take any chances and keep them on a pretty low carb, nearly grain free diet.  My biggest concern for their diets is keeping a lot of variety in there -- just like with people, dogs can't eat the same thing, day in, day out without having health issues -- so I try to keep things mixed up.  The other benefit I've seen with going low carb for them is that they're both at the best weight of their adult lives.