Nipple Bitting Infant

My son is gonna be 9 months on the 14th. He has both bottom teeth. I am a first time mom and need advice from moms who have done this before. I tried to bottle feed him again with my own breastmilk but he's not having it. What are some tips I can use nipple shields don't work either. I want to get him off by his first birthday which is in November. Please help a sista out!!!!!