Dogs can eat tomatoes. Tomatoes are rich in vitamin C. Feeding a small amount of tomatoes to puppies can supplement their body with some nutrients.

But when eaten in large quantities, they can be toxic to our dogs. Once a dog is poisoned by tomatoes, he will show symptoms of gastrointestinal discomfort, vomiting, diarrhea, lethargy, confusion, abnormal heart rate and other symptoms. If your dog sees signs of tomato poisoning, see your veterinarian.