Cows exploited for dairy on a prison farm. Consider a theoretical question. Which is best suited as a prisoner rehabilitation program: running a puppy mill, working in a slaughterhouse, churning out baby food, or growing marijuana? If you chose “none of the above,” you’re wrong. At least, according to the Canadian government, which has been training prisoners in slaughterhouse work for decades, and will soon see prisoners farming cows and factory-farming goats to produce infant formula for China.