its complicated lol. If we go by the requirements of what we look for in kibble then you want a Dry Matter figure between 1-1.8% (most dry kibble, technically they're giving you the GM numbers, but its dry kibble, the DM numbers aren't usually much off from that). To figure DM (using the
Beef Blend SmallBatch blend numbers as an example): 71% of the total is moisture (this is about right for raw food), so 29% is everything else. Take the number you want to calculate, in this case they give the calcium as .05% and divide by that 29, then multiply by 100 and you have the percentage of calcium in dry matter numbers. So .05/29=.0017x100=.17% calcium.
Now according to an
article I pulled up for Moonglow a while back that range of ideal calcium is approx equal to 3g of calcium per 1000kcal, Or
this article for DogAware suggests 800 - 1000mg of calcium per lb of food. I haven't tried to figure out if those two numbers are reasonably close in range cause kcal varies depending on what the food in question is and I'm lazy......but since we're talking beef heart,
1lb of beef heart has approx 508kcal, so the ideal would be 1.5g of calcium, which is a bit more than the DogAware article suggests but not excessively so IMO, especially since heart is a particularly dense high energy meat.
I'm not sure if thats going to help or confuse though....it made sense as I was typing it lol