German Shepherd Q&A
I don't know how long ago you posted this, but the best food that you can buy at this point is Eagle Pack Holistic Puppy Giant Breed Formula. Mine just turned 5 months and weighs about 60 lbs. She's eating about 6 cups a day. Although I think that the bag may recommend less, our vet said that when she walks away from her food leaving a few kibbles in the bowl, she's getting enough. Also, you need to feed about 3 times a day until around 9 months. Hope this helps!
give it real raw meat like chiken,every day and add some egg to the dry frood, once per week
I don't know what you are feeding her, but 3 cups a day isn't much. My 5 mo old mastiff is eating 7 cups a day and is a little under weight.
My 17 week old old is eating 7 cups a day, he weighed in at 62 lbs a week ago.