We have had 3 Great Pyres, 2 of which had sensitive tummies.
With one I had success with Natures Variety, not a large breed puppy food, but it helped.
My second one had an even more sensitive tummy but he did well on Duck and sweet potato, Venison and potato, Bison, etc. It could actually be the rice that’s bothering her. I think that was the culprit with ours.
I haven’t read all the grain free info out there, but I was thinking it was mostly the legumes (lentils, peas etc) that was more the issue. Try it with sweet potatoes, and other grains besides rice.
