According to the National Research Council of the National Academies, typical Weimaraner adult dogs who weigh around 70 pounds should eat a daily calorie intake of just less than 1,700. If you have a neutered dog this will be slightly lower, while those who are pregnant, or lactating will need more. Remember that this is only a guideline for dogs who enjoy an average amount of activity. True work dogs could need as much as double this amount. As for juvenile Weimaraners of around 40 pounds, they can exist on around 1,200 calories.