Cathie

Hi, I have a similar problem, i have a 14 week old Great Dane Puppy and she is quite skinny but she also has a sensitive stomach and gets diarrhea if she eats anything out of the ordinary.(Which is Eukanuba Large breed puppy, about 4.5 cups a day) Does anyone have any suggestions on how to put weight on her without given her anything too rich that will upset her tummy?