Understanding which foods are safe and which are harmful for pet dogs is crucial for their health and well-being. Safe foods for dogs include lean meats, cooked eggs, carrots, blueberries, and plain rice, which can provide essential nutrients. However, some foods are toxic and can be life-threatening, such as chocolate, grapes, raisins, onions, garlic, and foods containing xylitol (a common artificial sweetener). Other harmful foods for dogs include fatty or heavily seasoned items that can upset their stomachs or cause more severe health issues. Always research foods before offering them to your pet and consult your veterinarian for specific dietary advice.