Hi Dinamul D,
To your post I’d add that the AAFCO has set the upper limit at 1.8 % calcium for growing large breeds, which they define as above 75 lbs mature weight, and that for both the AAFCO and NRC calcium percentages the energy density of the diet is defined as 4000 kcals/kg DM. Adjustments based on energy density should be made for diets that vary from this.
In regards to NRC levels, the min. calcium for growing pups is 0.8%, the recommended level is reported as 1.2% and the safe upper limit is set at 1.8 %
