What are the benefits of using natural casing when making sausages?
If you're planning to smoke your sausages, natural casings will allow for greater smoke penetration than many non-natural casings, and they won't impart any odd flavors of their own to the meat. That said, when you first open a container of natural casings, they may have a strong smell because of gas build-up; let them air out (in the fridge!) and they'll be fine.