Quote Originally Posted by jenluckenbach
What I'd like to do is find some "natural" diarrhea cures. One I want to research is slippery elm bark powder. Maybe there are others. Any thoughts?
Found the following in a book I have.

Slippery Elm.
Long term intestinal problems are often helped by giving pets slippery elm (Ulmus rubra) tincture, says Dr Carson. She recommends diluting 20 drops of the tincture in a one-ounce bottle filled with spring water. Give cats and dogs under 15 pounds a dropperful three times a day. Pets 15 to 50 pounds can have two droppersful, and larger dogs can take three droppersful. It is best to use tinctures that are alcohol-free because alcohol may be harmful for cats.

Nux vomica
A homeopathic remedy called Nux vomica is good for the whole digestive tract and will help stop diarrhea, says Dr Carson. She recommends using a 6X potency, mixing 20 drops in an ounce of spring water. Give your pet half a dropperful three times a day

Pet supplements containing Lactobacillus acidophilus, available in pet stores. Follow the instructions on the label. Or you can give your pet live-culture yoghurt , which contains the same organisms, Dr Whitely explains. Cats can have one to two teaspoonsful of yogurt a day, spread over several feedings.

Firm with fiber. Dietary fiber absorbs a lot of water in the digestive tract, which can help stop diarrhea, Dr Stefanatos says. She recommends giving about one-half teaspoon of fiber-rich foods, such as canned pumpkin or flaxseeds, with every meal to cats and dogs weighing less than 15 pounds.

Hope something there helps your dear boy.
Prayers continuing.

Hugs and love