My 5 m.o. DS is just insatiable. The last time we got a decent night sleep was christmas eve. Since then he just hasn't stopped. I'm aware of the 4 month growth spurt but thought it was meant to last up to 2 weeks... We're still going eek. A good night for us now is up 3 times a night for a half hour feed each time. I'm not holding off on any of his feeds, I just went back to feeding on demand because it keeps him happier. But we can be feeding at least every hour on the dot during the day too. I have tried topping him up with a bit of pureed carrot but it didn't do anything so back to the boob it was. I'm trying desperately to wait till the 6 month mark to start introducing solids. But at the moment I'm just trying to hold on to my sanity too!