Fiber for Dogs Psyllium Seed Husk Powder & Dehydrated Beet Root Powder Aids a Number of Intestinal Disorders in Dogs Including Diarrhea, Constipation & Anal Gland Issues. Available in 6 and 12 oz.Keeps Dogs Regular, Naturally: Fiber for Dogs aids a number of intestinal disorders in dogs including diarrhea, constipation & anal gland issues. Formulated with all natural ingredients that help keep your dog regular, naturally, Fiber for Dogs contains psyllium seed husk powder and non gmo dehydrated beet root powder as the only two ingredients and is free of preservatives, artificial flavorings and colors. Veterinary Formulated: Fiber for Dogs was