You should feed your dog something that is beneficial to their health. Besides offering a lot of dietary fiber, banana chips are a good source of vitamins (i.e., vitamins b6 and C) and potassium. The fiber content in banana chips can help your dog avoid gastrointestinal problems. Minerals in bananas like magnesium can make your dog’s bones stronger and healthier. Magnesium also helps in the production of protein and absorption of vitamins. Your dog stands to enjoy a host of benefits associated with bananas. However, there are some cons.