What would be the best dog food for my active Siberian Husky with a sensitive stomach?

She is one years old and I've been struggling with finding something good for her. I originally had heron pedigree because that's what my fiancee had his german shepherd on but it gave her diarea so I switched them both to kibbles in bits and she was eating on it she just wasn't gaining any good weight her or the german shepherd needed so I tried iams a couple months ago and she wouldn't eat it, she literally put a little kibble in her mouth and spit it out the german shepherd gained a lot of weight but she wouldn't even look at it. I now have them on nutro and she somewhat eats it but isn't gaining any weight and the german shepherd is good and healthy I'm thinking about switching her to something else but I wouldn't know what. Her bowels are at least solid so maybe its the heat and because its her first time blowing her coat.