My Siberian Husky had a touchy stomach as a puppy. Ended up trying a bunch of different foods, as well as some specialty frozen raw foods (frozen raw meat chunks). Ultimately, I ended up needing to buy him a “high protein” food. The blue wilderness high protein food works best for my pup. I’d say it’s worth picking up a small bag to test.
Blue Buffalo Wilderness High Protein, Natural Adult Dry Dog Food https://www.amazon.com/dp/B003P9XGDG/ref=cm_sw_r_cp_api_glt_fabc_G5Q53M200Y21V1R86N46?_encoding=UTF8&psc=1
When switching foods, you shouldn’t go straight from one to another. Instead, try mixing 50/50 old and new for a few days before completely switching over.
Also, be mindful of the treats you’re using to train your pup. I ended up with plain old milkbone treats, and regular cheese for high value treats when training.
Good luck!
We use wegmans brand grain free. You can also order blue buffalo off amazon. https://www.amazon.com/Buffalo-Wilderness-Salmon-Recipe-24-Pound/dp/B003P9XGDG/ref=sr_1_3?s=pet-supplies&ie=UTF8&qid=1477759730&sr=1-3&keywords=blue+buffalo+dog+food