I never had alot of luck with plain salt. I would buy a Trace Mineral 50lb. block. They were a rust color. I'm pretty sure the farmers in the area used them for cattle. The deer would destroy them from late winter thru mid to late summer. When I was bow hunting I had only 2 deer over many years stop at the lick. They would walk right past them showing no interest. Obviously their diet had changed. I would love to put a couple out now, with my Cuddeback on them. It is against the law in my area to havea bait of any kind out.