Cutting back bottles

My doctor said my 9 month old should only be taking 3 bottle a day. Currently she has 4 bottles, I give her table food also. She is 21lbs 31 inches tall baby. She has a bottle in the morning, and after her 2 naps and before bed. How am I suppose decide which bottle not to give her. That advice seems a little out there but she is the doc. She says baby is healthy and above her milestones and is doing awesome development but to just cut one bottle. I think I’ll let baby wing herself from extra bottle. When I think about it some days not often she has 3 bottles. Is anyone else baby down to 3 bottles?