No problem on the questions.
Here is a link to the website where I got the information - I don't want to take credit for somebody elses work. They say cost is about $30 but that was a few years ago. Things have probably gone up since then.
We've just been using the red stock minerals the last couple of years. I tried the recipe here for a year, and it worked well too, but really can't say I see any difference in use. It might be better for the deer with the di-cal in it.
The red mineral salts run me about $12 for 50 pounds now. I also look for "name brand" mineral lick mixes on sale, ocassionally I can find the $10 stuff for $4 or so a gallon in liquid form. So I pick them up and add them in when I find them.
The bucks do hit the licks hard in spring and summer, the one with the picture of the two bucks get's pretty good size every year. Last year it was about a foot deep and 5-6 foot round. But it fills back in a bit each winter with runoff from the firebreak it butts up against. This year with all the rain, we can tell they're being hit, but not doing a lot of digging. Or if they are the rain is causing them to fill back in.
I'd say give them a try. I don't know if they help antler growth, but they will attract deer if put in a proper place.
“There are two spiritual dangers in not owning a farm. One is the danger of supposing that breakfast comes from the grocery, and the other that heat comes from the furnace.”