Originally Posted by
rogerstv
IMO you are making this waaaay harder and more expensive than necessary.
Go to the nearest farm supply store and buy a trace mineral block. No need to dig a hole, mix stuff, etc. Just drop off and leave. The deer will take over from there. They sell all kinds of blocks/supplements for livestock. Some disintegrate faster than others.
I have put out a mineral block with a white salt block close by to see which one get hit first. The deer destroyed the white block, and only went to the mineral block occasionally.