It seems that they've got their days and nights mixed up, which is what happened to 2 of my 3 daughters.
I just recently got my 1 month old on the right schedule...because she would sleep alllll day and be up allll night. So, I started keeping her up during the day. It only took 3 days for her to get it right, but I wouldn't let her sleep longer than 2 hours. I kept her up for at least 2. I didn't give her a full feeding, just half so she'd stay awake.
Some babies just never develop a schedule (like my middle DD). She was all over the place. My first DD was a dream...she put herself on a schedule...I never had to.
I'm not sure if you can do that (with the feedings), being that you have preemies, but my DD was born at 35 weeks and considered preemie.
But that's my suggestion.
at 8:52 PM on Sep. 26, 2009