Ok so I've read that babies can be sleep trained as early as 3, 4, or 6 months (and a minority of people have done it even earlier.)
I get the part about wanting LO to fall and stay asleep on their own, but does that mean you don't do ANY night wakenings? If you do, then do you feed them, change them, and then just let them CIO again?
Is the point to get them to sleep from a set bedtime to a generally set morning time? With them soothing themselves back to sleep in the middle of the night? Or just to get them to sleep on their own until the first night bottle/wakeup. (I'm assuming that at 3-6 months they still have a need to eat rather than it just being a comfort thing. I could be wrong though.)