R.H.
This is an issue for a speech pathologist who specializes in feeding issues. My son had to go to one because he would not eat anything except breastmilk from the tap for about 11 months. He ended up having a hypersensitive gag reflex and did not want anything else in his mouth. Simple issue, but if you wait too long you can develop other issues (My son had critical anemia). Definitely talk to you pediatrician ASAP and get a referral to a speech pathologist. They will be able to observe your child's behavior and determine the problem. The earlier the better though. Good luck!