Essential Oils - Updated

I am currently taking certification classes to become a Certified Animal Aromatherapist.  So far, I've completed level 1 which involved case studies, papers, and a final quiz.  I'm working through the case studies for Level 2 then will work on the term paper, other papers, and huge final quiz.  Then, on to Level 3 which looks to be just as intensive as Level 2.  That will put me halfway through!

I'm learning how to select the appropriate aromatherapy product for a particular situation.  This involves not only essential oils but also hydrosols, carrier/fixed oils, flower essences, clays, and other botanical products.  

It's a lot more information to learn than I expected... and it makes me want to learn even more about it.