Tail-biting in pigs remains a scientifically unresolved problem to this day. As a former farmer who raised pigs with intact, curled tails on fully slatted floors, a colleague from Germany and I investigated this issue in depth. Upon analyzing our combined practical experience, we found that not all scientific claims hold up to real-world scrutiny. After approximately three years, we were able to answer the key questions arising from practical experience. Specifically, it is possible to keep pigs of any genetic background with intact, curled tails in any housing system. Tail-biting is a deficiency-related issue caused by diet that places pigs in a state of biological distress; this critical