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Old February 24, 2013   #8
Join Date: Jan 2007
Location: PNW
Posts: 4,750

Not that much difference in blood meal from pigs, cattle, birds,
etc, other than possible antibiotic residues. Ditto for bone meal.

Unless the meat producers decline to use antibiotics, figure that
they all will have some. Whether it makes it from the soil into your
vegetable produce is a different question. Composting gives more
time for bacteria, etc, to break down compounds like antibiotics,
but the concentrations in the soil after adding blood meal or bone
meal may be so small that it is effectively a non-issue.
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