Little Big Cats talks about how to use slippery elm bark for cats; specifically how to find the right amount per weight of your cat. They also recommend a book called The New Natural Cat that has a lot of all natural medicinals and how to use them. www.littlebigcat.com
Feline Wellness is published by the same people who do Animal Wellness, they also offer a canine only version. You can sign up to get their newsletter if you don't want to subscribe to the mag. Be advised that not all of their advertisers share the same beliefs about grains and other ingredients as we do. Always check the labels of every product you're thinking of using for your cat. www.felinewellness.com/