[118b bottom] Mishnah: One should not buy milk from a shepherd. Since his job is watch other people’s animals, he might be selling products that are not really his.
Prac-T-cal Tidbits: Even though we would not normally steal ourselves, we also have be careful where we obtain our items and produce from. If situations appear shady, we should avoid potentially stolen items as there are several prohibitions regarding them. Additionally, should not enable thieves and help give them more reasons to continue acting that way.