They also carry a vitamin mineral mix.
https://www.henryspets.com/vita-mins/
At 2.7:1 Ca:P it is a good choice as it allows some foods high in phosphorus to be included. Foods high in phosphorus aren't bad per say, just a matter of confirming that you support the whole diet with a positive Ca:P ratio.
When a whole foods diet with a block diet is are both used, adding up the amount of calcium and phosphorus and magnesium is needful to support optimum close ratio of approximately 2:1 to 3;1 for the adults for both (Ca:P). I did this myself in a whole foods diet with no block at all; it just takes some time to do the workup. Clearly block diets are the most convenient.