This is sort of unrelated, but my father in law is a professional orchid
grower. And he raves about a product called "Hoof and Horn" that seems to be
made of African Antelope hoofs and horns. He loved it, because it took longer
to break down than standard hoof and horn meal.
He said it was imported by a company in California, but that he hadn't seen it
on the market for several years.
Anyone heard of this stuff, or know if it's still produced/imported?
You can email me personally if you have any source of it.