This is a very informative book, albeit a little more outdated than I would have preferred. I wish the author would release an updated version of the book.As many have pointed out, this book is dedicated mostly to dogs, so there's only a scant bit of information for other pets, unfortunately.
I love the list of 52 safe essential oils for dogs and the fact that there is a page dedicated to each one and explaining why the oil is beneficial for dogs specifically. There is even a list of top 20 essential oils in case one's budget doesn't allow for getting all 52 oils. There are also some recipes that are comprehensive in covering the various doggy ailments that can be treated with oils.
My main frustration with this book, however, is that while she lists the top 20 oils, her recipes call for more obscure oils (eg oppoponax, rosewood) that are not in that top list. Worse, she doesn't provide any suggestions for substitutes. So, even if you owned all top 20 oils, you still wouldn't be able to create any of the products from her recipe. Some of the top 20 oils aren't even used in any of the recipes. Since my main purpose for buying this book was to create safe essential oil remedies for my dog, this is somewhat frustrating because I now have to hunt down rather hard to find oils just to create a simple anti-tick spray. I could substitute, but oils aren't made equal, so the ratio would be pretty iffy for me.
Also, many of the spray recipes call for a decent amount of alcohol. My girl has very sensitive skin, so I'm scared to use alcohol on her. Yet, there is no alcohol-free version of her recipe so my choice is to either omit the alcohol and hope it doesn't lower the efficacy of the product, or include and hope that it doesn't irritate my dog's skin (which I'm loathe to do).
On the whole, I'm irritated and disappointed by the inflexible and limited recipes. But I am grateful for all the other helpful information provided. I do think that a lot of it could be found from careful online research, but it is nice to have it all compiled in a single resource.