My 17 week old son has started to wake up several times a night now even though was happily sleeping thru at 10 weeks old! He seems to demand the breast each time he wakes up (i.e. every 3 hours or so) and I am not sure if this is due to hunger (and readiness to wean) or just to send himself back to sleep. He used to be a brilliant sleeper able to soothe himself but the last 3 weeks have been a nightmare and getting worse each night! I am aware I should wait with solids until he's 6 months old (especially as there are food allergies in the family) but another 8 weeks of this? What does everyone think? Can a 4 month old really wake up several times a night purely due to hunger?