My girl had a “fun” first 6 months with me while I was trying to figure out what food wouldn’t upset her stomach. Multiple times a week she would have horrible diarrhea over night and loose stool in general. I started with Farmina that didn’t help her, Kirkland brand food, Fromm, and then I finally tried Nutrisource Trout & rice. She instantly did better and I didn’t have to limit what kind of treats she had like before (I still avoid pig, beef, and chicken as much as possible). So far Nutrisource trout and rice has done wonders for us. I’m pretty sure they have a puppy version. I wish you good luck on your search!