WOW! Thanks for the input so far!!
To clarify a bit more - Abby is awesome :-) She is a very happy baby during the day. Takes a 1 1/2 - 2 hour long nap each day starting at 11:30am. If I wake her up before she wakes up on her own she is the crabbiest baby you'd want to meet!
By 6:30pm she is literally falling asleep. She wakes up each morning by 7am.
She eats like a HORSE! Of all my children, she has the best appetite.
She sleeps in her own room - with a nightlight. I've tried it without - and either way she falls asleep super super easily.
I really don't think she is hungry - I just think she was so used to waking up to nurse and then waking up for a bottle - that it's become a habit. I had done the same with all my children but by 6-8 months they had all started sleeping through the night.
I'm very much OK with the ferber method - letting them cry it out. BUT - there are 4 other kids sleeping upstairs here and I know 2 of them would wake up for sure if I let her cry...
THANKS again everyone!! I'm very open for suggestions and new ideas!