Pretty sure pumpkin can be used as both actually. The enzymes are good for digestion and the fiber helps everything. Just make sure it's not the seasoned pie filling kind. Comes in a yellowish can I believe. I always have a can handy for things like this. I'd say put her back on the eukanuba to see if the stools firm back up. If they do, you know it's the food. Some puppy tummies just have a very very tough time with certain foods, it can be a very individual thing. I know some dobie owners with 4 different dogs on 4 different foods because of this. Euk puppy has chicken as a protein base if I recall correctly. One of the foods we use a lot for dobes with rumbly tumblies is Pro Plan. Not very irritating to the tummy and better quality than you'd think. It's not as great as innova, but it has a nice medium level protein and no odd tummy-irritating ingredients. Some of our home-cookers even use it until the pup is old enough for home cooking.
Something else you can try is California Natural Lamb and Rice. 5 ingredients in the whole bag. Many dogs to well on this.
Good luck and be sure to double-check with the vet!