Just read an article and thought it was pretty interesting:
Mixing recreational pot waste with pig feed had positive results.
Marijuana Gives Pigs the Munchies Too | TIME.com
Reuters reports that four pigs given pot-infused feed during the last four months of their lives ended up 20 to 30 lb. heavier than their siblings when they were all sent to slaughter in March. “They were eating more, as you can imagine,” said the pigs’ owner, Susannah Gross.