Ketchup is safe for dogs
You should probably avoid feeding your dog ketchup, even if it is generally safe in small amounts. It has very little nutritional value and it can cause potential problems. Ketchup often contains onion powder and onion can cause damage to your dog’s red blood cells leading to anemia. Ketchup is also high in salt and sugar. Salt can cause dehydration in your pet and sugar can lead to gastrointestinal discomfort. You also need to be extremely cautious with sugar-free ketchups, since some contain xylitol, which is fatal to dogs even in small amounts.