My 13month old only wants to eat chicken?

my sister went through a stage where she did not want to eat any vegetables. My mom made zuchinni and cauli-flower bread and muffins. You cant taste anything! and they are really good. Also, if your son only wants to eat chicken, then thats fine, but cook it in a healthier way. Use less oil, butter,etc. Also you should limit him to one sweet a day (one cookie, or whatever he wants, but once a day) Its better to eat food in portions. Also, as for the banana's, its healthy, so if he wants to eat it, let him. If you are really concerned, you can talk with his doctor, or talk with a nutritionist.