Due to space restrictions, my nearly 3 yr old and his little brother (nearly 1) share a room. Elder son sleeps wonderfully but little son still wakes at least twice a night (expecting a milk feed). How do I practice tough love (which worked with son one) and carry out controlled crying when I really don't want to wake up my elder son (who is so much harder to settle). Or do I just need to resign myself to the fact that my little son is not going to sleep through ever?!!!