Animal Essentials Healthy Gut Herbal Prebiotic Dog & Cat Supplement is ideal for pets on antibiotics because it feeds the good bacteria in the gut. This supplement contains extracts of certified organic chicory root, marshmallow root, fennel seed and yucca to support healthy digestion and help stimulate the reproduction of beneficial microflora in the intestinal tract. All of Animal Essentials’ premium-quality supplements for dogs and cats are formulated by the leading experts in holistic pet care to support your pet’s overall health and well-being.