Yes, dogs can eat sardines. Sardines are generally safe and healthy for dogs if they are fresh, raw, frozen, or canned in water. However, sardines packed in oil, brine, tomato sauce, or other flavored sauces should be avoided because these ingredients can be harmful or cause digestive issues for dogs. Small bones in canned sardines are typically safe, but larger bones may need to be removed to prevent choking. Sardines provide high-quality protein, omega-3 fatty acids, vitamins, and minerals beneficial for dogs' skin, coat, brain, heart, and immune health. Feeding sardines in moderation as part of a balanced diet is recommended, and dogs with pancreatitis or fat intolerance should avoid sardines due to their fat content.