How much should a growing german shepherd/rockwilder eat per day?

I have a six month old german shepherd/rockwilder and he's getting pretty big. He's about 65-70 pounds.

rockwilder....?

Every dog food is different. Cheaper brands take more to fill them up due to the poor qualty ingredients. Look at the bag to see serving size. The dog food may also have a web site for more info.

If you look on the back of the dog food bag, it will give you the suggested amount based on the age and weight of your dog. I'm sure you can also find that information online.

i have 2 ROTTWEILERS we feed them about 3 cups of food a day? so they dont gain alot of weight.

There are too many variable to tell you how much a German Shepherd/Rottweiler should eat. What kind of food you are feeding, what rate of metabolism he has, his exercise,neutered or not, living conditions etc. A dog his size eating a top quality food will probably eat from 5-6 cups a day but he could need more of a cheap food or less if he is an easy keeper.