Carrots are loaded with carotenoids, fiber, Vitamin C and Vitamin K (needed for blood clotting) as well as potassium. They have magnesium, manganese, most of the B vitamins and phosphorus, which is required for energy production.
Parsley freshens dog breath in addition to providing phytochemicals. It also has Vitamin C, Vitamin K, carotenoids, B vitamins, iron and limonene (an oil that kills bad mouth bacteria).
Bananas are high in soluble carbohydrates, so they're an excellent source of energy. The antioxidants they contain are helpful to a dog's fur and skin. Bananas are also rich in Vitamin C, are low in sodium, and rich with potassium. All these things are a great addition to your pet's diet.