RE: your deer minerals
Using Cow/horse minerals is a bit of a mistake. Cows, horses and deer do not all use the same minerals/protien etc, the same way.
While the high salt content will attract the deer, the benefit of the ingredients may be lost because deer and cattle do not necessarily need or use the same things food wise.
Using amineral block designed for deer,we use Hi-Pro on our ranch, is your best bet.