Honestly don’t ever start! I made the mistake with my first and she had to be rocked and nursed to sleep for the first 1 1/2 of her life! If they learn it and love it they own it and that’s when you are at the beckon call. I would try every kind of bottle you can with the pre made formula and warm it up a little. The pre made formula is more like breast milk and helps them to sleep for longer periods of time. This is what I found to be true for mine, although different things work for different children and you just have to find what works best and stick with it. Good luck
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