Are French fries worse for dogs than plain boiled potatoes?

Yes, French fries are significantly worse for dogs than plain boiled potatoes. While both come from the same vegetable, fries are deep-fried in oil and heavily salted, which makes them high in fat and sodium. This combination dramatically increases the risk of pancreatitis and salt toxicity in dogs. A small piece of plain, boiled potato is a much safer occasional treat, whereas fries should be avoided altogether.