When is the best time to start sleep training? Sleep training is not just a matter of leaving your baby to cry. Its implementing good sleeping habits from a few weeks of age so your baby learns not to rely on you to put them to sleep. If you start sleep training early it will help you with feeding and some simple structure through the day which is crucial if you are juggling with the needs of your other children. All this is not easy if you are not getting a lot of sleep but if you make the effort it will pay off in the long term.
So the answer is when baby is a few weeks. If you are already in a situation whereby baby is not sleeping well, at any age you can make changes to better the situation. Sleep training just means making the current situation better or creating good habits from the start!