So I spoke to my vet and he said that it's not actually the percentage of calcium but rather that percentage in combination with the other nutrients and vitamin B!2 that I should be looking at. So, me being me, I asked if I sent him all the stuff via email would he take a look at it and give me his opinion. He was very interested in the food and wanted to be more informed of new foods available on the market. So I guess he'll get some new information and I'll get an opinion I value greatly. I'll report back what he says in case others are interested.