Dogs can eat peanut butter because it's usually free from harmful additives and easier to digest, while peanuts—especially salted or flavored—can pose choking hazards and contain unsafe ingredients like xylitol.
The best thing to give dogs for breakfast is a balanced meal that includes high-quality protein, healthy carbohydrates, and essential vitamins and minerals.
Both chicken and eggs are excellent protein sources for dogs, but chicken is better as a primary protein source, while eggs are a nutritious supplement.