Greetings all; Camphor is an essential oil. Essential oils have been used more frequently with the wave of "new age," only to find out all that is natural is not good for everyone. The phenols in many essesntial oils are actually toxic to the liver of different animals. Kind of like letting the kids draw and design with toxic magic markers that cause liver damage. Ferrets are all nose - if anything is strong to us, I would imagine it would be overpowering and hurtful to their sensitive systems. I know Carol Komitor addresses this in her Healing Touch for Animals classes where she utilizes essential oils on the animals she works to heal. Hope this helps, LJ Feed rescued animals in two clicks http://www.theanimalrescuesite.com/clickToGive/home.faces?siteId=3 LJ [Posted in FML 5833]