Hey all, first time poster!
We initially sleep trained my little one successfully at around 6.5 month in a sleepy head, in their own cot / room with the Ferber controlled crying method.
They've now outgrown it somewhat and so we tried removing it, which has proven disastrous! They're now 7.5 months and very active for someone their age; able to roll, and even stand propping up using the cot bars.
How on earth do we get them to settle when each time we walk away, they roll and get up! 