The slaughtering process needs to be carried out fast and painlessly in order to avoid submitting the animal to unnecessary suffering and to permit exsanguination in order to guarantee the best preservation of the carcass. It is therefore advisable to stun the animal before commencing. The use of inert gases constitutes a valid alternative to old, less used or more violent, stunning methods. The use of inert gases causes the animal to lose consciousness without causing suffering, damage or loss of blood. Furthermore, it is possible to reduce the pH and, as a result, the microbial content of the meat. This ensures better preservation.