Mahon said he created the sculpture, and chose the medium, to protest what he considers Smith's too-soft stance on pollution created by dairy farms. He said the bust did not smell and would last forever.
"The sculpture has a hollow head, which is very fitting. It is highly polished and sits on the stand slightly to the right of center," Mahon said.
Mahon gathered cow dung from an organic dairy farm, ground it in a coffee grinder, mixed it with a polymer resin and pressed it into a mold. He polished the sculpture with beeswax to create a finish that resembles bronze.
Smith joked about the tribute Friday.
"Excuse the pun, but I would describe it as crap art," he said.
Mahon's said he will use the proceeds from the auction to help clean up waterways polluted by effluent from dairy farms near his home.
