How much formula and how do I wean from the BB's?

[Curly]

Start off with a Step 1 formula, not Step 2. And if bub is happy on Step 1, you don't need to worry about Step 2 at all.

Step 1 is whey based, Step 2 is casein based. Step 2 is good for hungrier babies because it is harder to digest but that same factor means it does cause constipation in a lot of babies. The nutritional differences between Step 1 and Step 2 are miniscule.

The first trick will be getting her to accept the bottle of formula so pick one feed of the day and try to get her to have the bottle then. In my experience Nan and Bellamy's Organic have the sweetest flavour and smell. Breastmilk is quite sweet...my exclusively bfed DS would only have Bellamy's. I started DD off on Bellamy's and changed her to Nan, only because the shops had run out of Bellamy's, and the flavour and smell was fortunately almost identical. She started sleeping through once she was on Nan so I never changed her back (don't know if it was related but I wasn't game to mess around with what seemed to be a winning formula, pardon the pun!)

My MCHN always recommended Nan or Heinz. I personally think Karicare smells and tastes awful and DS wouldn't go near it. S-26 has a bad reputation for causing constipation but most FF babies I know are on S-26 with no problems...but thought it was worth mentioning.

So replace a feed a day with the bottle and when that's been going well for a few days and your breasts have adjusted, introduce another bottle...and so on and so forth.

Once you are on formula full time you'd be going through nearly a tin a week in my experience, but you will also be introducing solids soon so that will slow down around 9 months or so.

ETA: I'd also start her straight on a fast flow teat of whichever brand of bottle you choose.

ETA2: Start by making up the recommended amount for her age on the back of the tin. You'll soon get to know how much she needs to feel full. DS never drank the recommended amount for his age but DD did.

ETA3: You have to chuck any leftovers in the tin out after 4 weeks, if I remember rightly.