DS 4 1/2 months devours every pureed thing that touches his lips (always after usual milk feed) but has stopped sleeping and i'm at my wits end. He was going 10.30 to 4-5am but now wakes every 1/2 to 2 hours from about 2am. He doesn't seem too distressed (unless ignored) just very active and awake, but will only go back to sleep with a feed and cuddle. He's mostly in our bed--is this keeping him up?is it the food? please help i'm reaching sleep deprivation explosion point.