If you have a dog, you might be wondering if strawberries are safe for them to eat. However, strawberries contain a number of tannins that can upset your dog's stomach. Some symptoms your dog may experience are diarrhea, abdominal pains, lethargy, vomiting, and fever. Before feeding your dog any of these foods, it's best to consult your veterinarian and practice moderation. Always be sure to supervise your dog when eating new food, and always monitor your pet's reactions to it.