rusty old steel...

That sucks and was probably quite scary. Did the doctor diagnose tetanus? As you well know, diabetics can suffer from foot problems like vascular and nerve damage. That would definitely require precautions for any infection in your foot and keeping you in for observation was definitely the best choice. Glad to hear it worked out.
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Yes on the tetanus. Dr was suprised it missed the nerves.
BTW this happened in my horse barn. There was plenty of horse poop around.