Calcium is one of the most important minerals for growing and maintaining the skeleton. Both calcium and phosphorus are playing an important role. That is the reason why the ratio of the amount of calcium to the amount of phosphorus in the food must be correct. The body of the dog needs more calcium than phosphorus. That is because calcium is also used for other reasons, e.g. in the muscles during contraction. Generally speaking, the proportion of calcium to phosphorus should be 1.2 to 1. The same proportion is recommended for bitches being in pup, lactating bitches and growing dogs. The mother’s milk has also a ratio of 1.2 to 1. In practical terms it means that the daily intake should be approximately 130 to 260 mg of calcium and 110 to 260 mg of phosphorus per one kg of body weight. The proportion of calcium to phosphorus in meat is around 1 to 1.7. Complete fresh meat meals have a sufficient amount of calcium. Extra calcium is needed for home-made meals.