Baymule
Herd Master
I had lambs eating dirt from fresh gopher mounds. I had some Azomite that I bought to mineralize the soil in the garden, so I offered them some. They licked it right up. It is rock dust from an ancient lava flow, from Utah. I now keep it out for all the sheep. I bought it on Amazon.
http://www.azomite.com/
http://www.azomite.com/