How much food do you feed a year old Rottweiler?

A puppy eats a lot of food. From birth up to six months of age, he'll need to eat two to four times as much as an adult dog to support all that growth. A good rule of thumb (paw?) is that after his first week of life, when his weight doubles from what it was at birth, a puppy should gain one to two grams per pound of anticipated adult weight each day.