If there’s anything that can send your child’s sleep off the rails, if there’s an arch-enemy for sleep training, it is, without a doubt, the dreaded condition of over-tiredness.

One of the most common questions I get asked as a baby sleep consultant is, “When should we move him into a big kid bed?”

My favourite answer to this is, “Later,” and there are a couple of reasons why I say that.

That right there might be the single most common question new parents ask. Is it a developmental milestone? A regression? Are they getting too much sleep during the day, or not enough?

This is a tricky scenario that I see a lot of parents dealing with. They want to move their youngest into a room with their toddler, but are unsure how to sleep train without waking up the older child.

The biggest reason why the solutions that work for one parent don’t work for another is simple. They’re not dealing with the same baby.

One of the most aggravating situations I see parents running into when they’re sleep training is the sudden onset of a minor illness when they’re finally seeing some progress.