I have a pup with senstive stomach also and its been a challenge to find him something he can eat that wont cause him to throw up. We have pretty much ruled out any food high in protein/fat. He does best on a protien level between 26 and 28 precent and no higher. I had him on SD I/D for awhile and he did good but didnt seem like he was getting enough to eat, he wanted to eat all the time so I started looking around and asking for suggestions on here. We tried Natural balance and Wellness solutions and he wouldnt touch it. It was also recommended to me try a food that is fish based, because it is low in fat and protein but I couldnt get any of my dogs to eat anything that was mostly fished based. So at my wits end I decided to try Life's Abundance (again), and all of my dogs have been eating it for almost 2 weeks with out any troubles at all. Im not recommending this food to you..

.. just telling you what worked for us. On your list I would of suggestions I would try Nature's recipe or the SD..good luck, I know how frustrating it can be..