My boss gave all the office staff a planter full of pretty flowers, which I thought were daisies. I've since taken them home and left them -- and my cats -- unattended, but I just found out the flowers are actually chrysanthemums, which I know to be poisonous. How poisonous are they? Are they as bad as lilies or poinsettias? I don't know how likely my cats are to eat the plants (they prefer greens and typically only chew on my plants to get my attention), but I can't stop worrying about it and I'm stuck at work with no way to get home and no one I can call to go check on my kitties. How bad is this?