food issues

Cali, my year old Airedale suddenly stopped eating one morning a couple of weeks ago. This dog is a food hound and this happened literally overnight. She went 6 full days without eating a single thing. Drinking water normally. A couple of vet visits during that week; barium x-rays, bloodwork...

What food would you recommend for a dog who has a sensitive stomach? He's a 6 1/2 month old Siberian Husky. He gets diarrhea very easily and drinks excessively (to the point he makes himself sick). We've taken him to the vet to rule out any medical issues going on and I believe it's diet...