My son is 7 months so alot younger than yours but we are seeing a speech therapist next week to assess what is going on as he refuses to eat. He has reflux so am wondering if there is a pain association going on, but will be interesting to see what the therapist says , e.g., if there is a muscle problem in his mouth. He doesnt babble yet so maybe this is related?

The paed will be a good start and a referral to a speechie may help too.