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 they 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.