Rinse sweet potatoes and green beans. Trim ends off green beans and carrots. In a large baking dish, add all ingredients along with about 1 cup water. Bake at 375 until meats are cooked through, and sweet potatoes, carrots and green beans are tender -- about 45 minutes. Stir as you can, and add more water if mixture begins to stick. After cooked, chop vegetables into appropriate sizes for your dog (easier to chop when cooked - you can chop beforehand if you prefer). Makes 8 pounds of delicious, nutritious homemade dog food.