Unpasteurized milk can carry salmonella, campylobacter, and E. coli O157: H7, the strain that came to public attention in the nineties when four children died after eating contaminated meat at Jack in the Box.
Back in my kitchen, I unrolled the meat and scored the rind using a box-cutter, making the lines as close-together as I had the patience for, aiming for about a half inch apart.