What is the yellow stuff in can of dog food?

The yellow stuff in a can of dog food is usually corn. Corn is a common ingredient in dog food because it is a relatively inexpensive source of carbohydrates and protein. It is also a good source of fiber, which can help to keep your dog's digestive system healthy. Some dogs may be allergic to corn, so it is important to read the ingredient list of your dog's food carefully before feeding it to them.