When I went back to work dd would not drink any formula, I think because she was solely bf up to that point she just didn't like the taste of formula, I used to get up early and bf her before I left, mainly to ensure my own comfort.
Strangely although she kicked up a fuss about drinking ebm when I was in the house, she quite happily drank it when alone with dp... who anounced the whole stay at home parenting thing a complete doddle... of course the fact that my home resembled a bomb site was a complete other matter.
I of course spent the first day back at work ringing home every five seconds and then went home early.... Was quite dismayed to see dd happily playing with dp, don't think she even noticed I was gone!!!!