Both of mine get Pro Plan sensitive stomach dry and canned.

We had such a problem when we got Sierra, she has the runs all the time, tried all types of food, then found Pro Plan Lamb and Rice worked good. Buddy came to us, and he had the runs while eating it... so we switched to the sensitive stomach and they both do wonderful on it!! Firm stool, soft shiny fur, clean teeth, and no stinky breath at all!!! Both of mine are skinny pups, I've had testing done on both, no heath problems found, just skinny dogs, and for GSD's I guess that's a good thing!!!