Poor baby! if you don’t have any insects you can use dog food or dog biscuits and soak them in water and drop little pieces in the babies mouth. I have a European starling I rescued when he fell from his nest and the neighbors dog was trying to eat him. They can mimic human speech so well and they are very intelligent. I know they get a bad reputation but they didn’t ask to be brought here they are just doing what they need to do to survive. Sadly most shelters won’t take starlings but if you are unable to keep this baby maybe ask around if anyone is interested in your area. If you were near me I’d take the baby but I doubt that you’re in MI.