Dramatic, but please people, DO NOT allow your cats anywhere near Lilies. (All of them). They are DEADLY. It's not just pollen, but leaves, petals and any part of the plant.
DH & I had to have our beloved, gorgeous dear 4 year old cat PTS this weekend because he had renal faliure - caused by Lilies. In a million years, I don't want others to experience the grief and the week that we've just had.
Please don't have Lilies anywhere near your cats. It's not worth it.