Remember that essential oils are unsafe for cats (can be lethal). Floral waters are best suited to them.
There are many literature on unsafe essential oils but only a little on those unsafe for animals. One rule applies to all though is that if it is unsafe for humans, it is unsafe for animals as well.
It is important to know which essential oils you can use on your dog or horse and to remember that what might suit one, might not be suited for another one.