My 2 mth old will not go down to sleep - I feed/rock/pat/whatever is required to get her to sleep in her crib but 10 minutes later she is awake again and crying. This can go on for hours, the whole evening. My poor 5 yr old is suffering greatly - having to eat dinner alone and forgoing bedtime stories because I'm trying to settle her sister. My LO is obviously tired and I know she is fed, dry, well etc so am seriously considering just letting her cry it out for an evening to see if she settles. We had to do it with DD1 so i know it works but she was 6 mths old. I know there r lots of people on here with strong views on CIO but respectfully I am not asking for anyone's opinion on it in general, I'm just wondering if anyone has tried it on a younger baby and if it ended in a happier sleeping outcome. Thanks :)