Some of the very same basic principles of natural health apply to dogs and cats - except that they are carnivores of course. For that I think that they have suffered more than the horse who at least can get the bulk of its diet from grazing and from hay. The majority of dogs and cats, on the other hand, eat the same processed foods full of toxins and additives every day of their lives. They are then vaccinated annually and doused with flea killer products; this further weakens their immune system. PLEASE read what Dr. Martin Goldstein or Dr. Richard Pitcairn have to say about diets and feeding your pet (both books available in the bookstore or get them from your local library).
Below, my beloved dog Cody who passed away several years ago having a special roll in the grass with my cat Bono, both enjoying a rare sunny day in the Pacific NW. Good nutrition, lots of love, and fresh air makes for a healthy, happy pet!
Silver Lining Herbs - the best and most comprehensive herbal mixes (for horses and dog) that I have found and extremely competitive pricing; I was about to make my own mixes when someone recommended Silver Lining. The mixes are specific, yet the herbs used can have effects on a number of different body systems (e.g., your horse or dog will never just have a liver or immune system problem - think of a domino board and when one section goes down more will follow elsewhere.)
Shop the Sage Dogs pet store for toys and more
WYSONG - supplements for equines, humans, and pets - I use the Biotic series for my horse and cat with excellent results, and my cat LOVES the archetype food. I use that along with Innova cat for superior nutrition (although I know that a raw, fresh diet would be best, I am being realistic here with two small children, and he does get to catch voles and mice in the backyard along with sunbathing). I have seen and felt the best and softest coats on both my horse and my cat while using the Wysong supplements.
Azure Standard - Quality Bulk and Natural Foods - get the ingredients you need for making homemade dog and cat foods and treats while you shop for yourself.
Dr. Martin Goldstein - the author of the book that many years ago set the wheels in motion for this site
Earth Animal - home of Dr. Martin Goldstein's brother, Bob Goldstein, also a veterinarian
Cesar Millan - The Dog Whisperer - Cesar has a television show on the National Geographic channel as well as having authored books; he is both amazing and at the same time very simple and basic - a must see/read if you have dogs!