Your problem with deer may of course indicate a lead deficiency...
LOL! A light sprinkling of lead would definitely help with my deer problem, but where I live is close enough to the 'downtown' area of our little village that any gunfire usually brings a response of flashing lights and sirens. I have a nice compound bow I inherited from my father, but I still need a bit of practice with the broadheads.
I've used paintball and BB guns to shoo them away for years but I've been experiencing diminishing returns with that practice. My best bet will be to finish the fence.
RE: The joy and sorrow of this year's corn.