Most calcium phosphate in the food and animal feed trade is produced from
phosphate rock, not bone meal.

Yes, but the phosphate rock is made from the skeletons of millions of
prehistoric animals. What is a vegetarian to do?
Iris,
Central NY, Zone 5a, Sunset Zone 40
"If we see light at the end of the tunnel, It's the light of the oncoming
train."
Robert Lowell (1917-1977)