Nutri-Pet Research Nupro Small Breed Dog Food Supplement for Small Dogs of All Ages, 1 Pound Veterinarian Recommended. Researched and developed by a doctor of nutrition, using fresh, premium quality health food ingredients. No wheat, corn, fillers, grains, artificial sugars or preservatives, glutens or by-products of any kind. Contains Glucosamine complex MSM and Ester-C. This all natural food supplement is beneficial for small breed dogs of all ages.