Feliway Classic 30 Day Cat Calming ½Feliway is the UK’s leading cat behaviour product scientifically proven to help stop and prevent unwanted behaviours in cats. When a cat feels safe in its environment, it will rub its head against furniture, walls or the bottom of the curtains, leaving behind substances called facial pheromones. Feliway is a synthetic copy of this pheromone and is proven to reassure and comfort cats, helping them to cope with changes in their environment. Developed after years of veterinary research, Feliway is scientifically proven to help stop unwanted behaviour in cats. Easy to use and scientifically proven with over 13 published studies showing efficacy. Species specific with no effect on humans or other household pets. Box contains 1 x 48ml refill vial Each vial lasts up to 4 weeks.