Now, this story about the Denver zoo is interesting enough in and of itself:

Practitioners of aromatherapy say their oils extracted from plants promote physical, spiritual and emotional health. There are thousands of essences, but they are used primarily on people.

The Denver Zoo is believed to be one of the first to try it out on animals. Keepers say it has eased ailments and tensions among the primates.

However, one of my close relations had a very... intimate (and unfortunate) encounter with aromatherapy gel. I post this in the hope we can shake the story loose from one of the witnesses :).