Dropping night feedings?!?

Ta
We had our 9 month well check this morning. Our Ds is doing great so far but still wakes 1-2 times a night and has a bottle of formula each time. He has 3 meals of baby food along with bottles throughout the day. I'm looking for advice on how to drop the night feedings without causing both of us undue stress. When Ben wakes at night he is super upset so I do not want to make it worse. I want to drop the night feedings as his dr suggested in order to get him truly sleeping through the night so any advice would be a great help! What worked or is working for you guys? Should I  wait longer to drop them? FTM and not a huge fan of the idea of letting him CIO. Thanks in advance for your help!