I try to be completely honest with all potential buyers, and tell how our cattle have been raised, handled, and vaccinated up until the time of sale.  We are careful to give all shots in the neck, and closely moniter all recommended vaccine withdrawal times.  We do everything possible to keep our livestock gentle and calm.  At the time of sale my conscience is clear.  I don't feel that it is my responsibility, or any of my business, to tell future buyers how to handle the cattle from that point forward.