if you know she's not hungry (she's eating solids on top of breastmilk), then you can try sleep training. i'm against cio too but i found this great book good night, sleep tight by kim west and i've mentioned it to several people here on this forum b/c i just can't believe how well it's working. my baby was just like urs -- started waking up every hr or two and my husband and i were at our wit's end but whenever we tried to do cio or some other sleep training, it failed. anyway, you have to teach your baby to put herself back to sleep b/c we all wake up now and then in the middle of our sleep but we don't remember b/c we just put ourselves back to sleep w.o thinking about it. believe it or not, that's a skill that babies have to learn. so the key thing is to not rock or breastfeed her to sleep. she has to fall asleep on her own at 7pm so that when she wakes up at 1 am or 2am, she can do it on her own! so basically, what you do is get her drowsy but awake and then put her in the crib. she should be aware that she's going in the crib. most likely, she'll cry or pop up (if she's standing already) but you don't pick her up. you just say "shhh" or pat her intermittently (not constantly) and you stay right by her crib until she falls asleep (make sure it's a deep sleep before leaving). the baby doesn't get hysterical b/c she knows you're there (although she will cry) and it'll take about 30-40 min total. every few days, you move further from the crib (halfway across the room, at doorway, etc.) until you're comopletely out of the room and she's ok w. that. in the middle of the night, you may have to just do what u normally do if you can't have her crying cuz of the neighbors. my baby mastered the falling asleep on his own (in about 2-3 days, he didn't even cry when i put him in the crib w. his pacifier. i'm stil in the room (close to the doorway) but i don't even have to say shh or pat him anymore -- he just looks at me, looks at hte walls, plays with his bumper, etc. til he drifts off to sleep. anyway, i foud that once he could do that, he has stopped waking up in the middle of the night! i know he still wakes up b/c i'll hear a cry but then if i wait a minute, he just tosses and falls asleep again. turns out it really is a skill a baby can learn! one note - my baby wasn't feeding middle of the night so your case might be a little different. i highly recommend you get the book as it goes into a lot more detail re: nighttime feedings and early morning wakeups (although anything after 6am is considered a healthy wakeup for babies). good night sleep tight by kim west. get it from the library if you dont wanna pay. sorry this is so long but i had another glorious night free of nighttime wakings after a year of restless sleep and crazy tired mornings and i'm really passionate about the book right now!! my husband and i are kicking ourselves for not getting it sooner. good luck :)