Reduction of the olfactory cognitive ability in horses during preslaughter: Stress-related hormones evaluation

► Mentholated ointment applied to nostrils of horses following blood sampling in lairage. ► Treatment had reduced plasma concentrations of epinephrine and norepinephrine. ► Mentholated ointment applied to nostrils of horses pre-slaughter reduced stress response. ► Mentholated ointment could be used as alternative to or in combination with visual barriers.