hi Carla.
well, it all depends on what she does after that first 6 am feed- does she go back to sleep until 7/7:30? if so, I'd maybe try offering less at 6 am, not a full feed, and the rest at 7/7:30 to start your day from there.
the same actually for 5 am feed- it's still night time, isn't it, so offer as much as is enough to let her sleep until 7 and feed her again at the start of your day.
Monika