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Given the risk autoclave is in order for wild bone. But
that is cooking hot and might wreck them for your purpose.
You may have to look for options, Peroxide and Bleach
are a good start.

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Bone has risks in terms of disease. All bone use in bone meal is supposed to
be autoclaved (hot steam) to prevent the transmission of anthrax of all things. Pet store bone should be OK as it...