Grain Elevator is the ticket. Also grocery store
100# Stock Salt
50# Trace Mineral
50# Di Cal
Box of A&H Washing Soap
Dig hole 6 inches pretty good size around. Pour Salt, Trace Mineral and Di Cal in, cover with A&H Washing Soap, cover with layer of dirt, pour water over. Redo in 6 months then once a year.
They will make a hole eating the dirt too.
Al