My best friend, (who is a late vocation to cat parenting) but utterly converted. Often had a vase with lillies in his hall table. Level with the stairs and in very easy reach of his two cats. He won't move them as he insists they don't go near them. But it still worries me that they will come into contact with them as most cat's I know like flowers. I've told them they can be fatal but he still won't move them. Not sure what else to do to convince him to move them.