There's something about dryer sheets...

mutton tallow, originally uploaded by thegreenvinecoop.

that led me to assume they would be vegetarian. My friend Brooke pointed out that they are usually (but not always) made with tallow.  My other friend Google--with whom I sadly visit much more often--proved her right. I've used them in the past but, having never been very fashionable or wrinkle-conscious, its never been a priority. I've been trying to mostly line dry my clothes of late anyway...