[pitlove]

Hi Wagarfamilydad-

The AAFCO just recently revised their nutrient profiles, which meant changing their min and max appropriate calcium and phosphorus levels for large breed puppies. A ratio of 1:1-1.8:1 is now considered safe 1.8% calcium being the safe upper limit.

So yes, those ratios are appropriate.

Grain inclusive vs grain free is a non-factor in LBP growth and should be of the least concern during growth. Dogs are perfectly able to digest and use grains efficently. Personally, my dogs do much better on a grain based diet, and actually even better on corn based diets like Pro Plan.