McNamara said in order to introduce a drug or medicine to feed that's being given to animals that make part of the food supply, the federal government must sign off on it after extensive review. He adds that research has shown that cannabis ingested can be transferred onto tissues.
The U.S. Food and Drug Administration is the agency that oversees the nation's food supply. The agency, on its website, says it "approves the additives or drugs that are used in feed products."
Currently, Gross is only feeding three pigs the marijuana mix, which on a recent afternoon the chopped down on with fervor, sticking their snouts into the pile of mash.
Asked if feeding marijuana affects the pigs, such as perhaps giving them munchies, Gross said can see no effect on the pigs.
Already all pigs do is sleep and eat, he said.
But his farm manager mentioned that one of the more salty sows mellows out after a feeding.