My DS isn't quite 12 months and I am currently working 5 days for 2 weeks and then will cut back to 3 days a week after that for awhile. He doesn't seem to miss it too much, I feed in the morning before work and he isn't always that interested, I feed after tea and a bath and the it's bed. He might wake once or twice through the night and usuasually wakes between 5 - 6 am for a feed and straight back to sleep. My supply seems ok but I think it's too soon to tell. On the weekends I feed him his lunch feed (which is really the only one I am missing) and through the week he just has water in a sippy cup. It did take him awhile to get use to it but he has got the hang of it now.

GL