Key Takeaways Yes, dogs can eat seaweed snacks and supplements, if they do not contain garlic or onions.  Seaweed is nutritious and contains protein, iron, iodine, magnesium, and omega-3s. Dogs should not eat wild seaweed on the beach because of pollutants and digestion risks. The quick answer: Proceed with caution. Commercially produced seaweed snacks without … Continue reading Can Dogs Eat Seaweed?