For a newborn Rottweiler, mother’s milk is ideally recommended. In case it is not available, you can give them a good quality baby dog milk every 2-3 hours. For puppies above two months, the required food amount is 2-3% of their expected adult body weight. You can divide this into three meals per day. Grown-up Rottweilers should consume at least 2100 calories daily. For Seniors, you can give 400-500 calories per meal two times a day.