Fortunately, the treatment involving the largest animal on our list has nothing to do with excrements of any sort. As extremely intuitive animals who can sense energy and even mirror the feelings of humans, horses have long been turned to as a means of helping individuals suffering from depression, dementia and even those undergoing drug rehabilitation through the practice of equine therapy.

Now, equine therapy has become a spa treatment in lieu of relaxing massages and facials. Instead of lying on a massage table surrounded by lightly scented candles, clients relax upon a bed surrounded by horses that, say proponents, will clear energy blocks in the body through snorting, sniffing and sometimes relieving themselves in your vicinity (I guess some excrement is involved.) A typical equine session can take anywhere from 20 to 90 minutes -- the horses determine the duration of your session and when you're ready to walk away, feeling more emotionally sound ... which can do wonders for your health and your skin.