The Zignature Trout & Salmon Formula Grain-Free Small Bites are perfect for small dogs and adults. These dry dog foods are made with a limited ingredient formula that is free of grains, sugar, and artificial colors. The fish-based ingredients give the food a rich, meaty flavor that your dog will love. The single protein source is salmon, which means the food is high in protein and low in fat. The age range description is all life stages, which includes puppies and adults.