He sounds amazingly besotted with your DD. Gorgeous!

It's frustrating isn't it, when they just don't seem to understand. My DH spent the first week of DD1's life trying to tell me how to feed her and it got me really stressed out.

If he is not listening to how you feel about it, maybe ask him why he is so concerned about FF. What is the worst thing that he thinks is going to happen? I really don't know but it might open the discussion up a little bit if he has to start justifying his opinion rather than you always justifying yours.