Goldenseal (Hydrastis canadensis) is known to have several benefits for dogs, from digestive conditions, kennel cough, tapeworms, and more. Goldenseal has anti-inflammatory, antimicrobial, astringent and antiparasitic properties.  Goldenseal is one of the five top-selling herbal products in the United States used by humans. It is very safe for animals use as well. Oral goldenseal can be added to your pet's food or water, or squirted directly into the mouth. Apply topical goldenseal may also be used as a mouthwash. It's used to treat sore gums and mouth. It's also used topically for these conditions: Skin rashes and animal coats.