Dear Jim,
I have been reading your blog for a bit and I appreciate your flow of information. One thing I (finally) saw that should be added [to the commentary on Prussian Blue and Potassium Iodate] is the popular poison oak [and poison ivy and poison sumac] treatment called TECNU. It was originally created as a waterless decontamination for nuclear fallout. Just a minor but currently easy to obtain treatment. – Ferk
Dear Jim:
What B.F. is looking for is US Pharmacopoeia (USP) listed Prussian Blue. It is sold by prescription. Get a friendly doc to write a script for it and present the script to your local pharmacy. While your at it, make sure you have antibiotics for your stock. Otherwise, even a minor knife or gunshot wound can kill you. – S.F. in Hawaii