Dorwest Tree Barks Powder For Dogs and CatsHelp keep your pet’s tummy naturally comfortable and stools normal with this blend of complementary digestive herbsOur Dorwest Tree Barks Powder contains three herbs that are renowned for their digestive health properties. These work together as an effective digestive aid for dogs, to promote comfortable tummies and normal stools.Slippery elm bark - contains mucilage, a sticky substance that helps maintain good bowel regularity and stool consistencyMars..