Hi C.,
Have you tried mixing an infant cereal with her milk? You'd need to get a nipple that has a larger hole. Or just feed her a thick mixture of cereal right before bedtime. Her belly will be full and she won't digest it as fast.
I would also try bathing her in infant lavender bath right before her last feeding.
It also sounds that perhaps she's not burning enough physical and mental energy during the afternoon. If she's sitting in a swing, bouncer or play pen then she's not getting much needed exercise.
You know yourself when your mind and body works hard during the day it rests better at night... at least you did before your daughter was born. :) Think of ways that you can get her active before that calm bath time.
What ever, if any or all, it sounds as though your routine needs to change. If I were you I would start out gradually with the food and bath time with limited physical activity and increase until she is the happiest and that will most assuredly lead you and the rest of your family happy as well!
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Edited after the fact: Along with most of the other posters I must add that bottle feeding isn't the best idea during the night. However I would not recommend changing everything at once. You'd only confuse your daughter. Your ultimate goal should be to wean her from the bottle altogether. Sippy cups with water is a great idea, however eventually that will need to be dealt with as well. You're going to have to set a goal. Are you going to allow food/drink in bedrooms? If not, set a goal ... at what age will the water cup be discouraged. It's not too early to be thinking ahead. If you never give a water cup for the child to self soothe you won't have to discourage that behavior in the future. Getting up for 3 minutes once a night is easier than feeding several times during the night. I also want to mention that once her new routine is established then don't expect yours to fall right into place. You're going to need new goals as well. You're sleep cycle has made havoc with you... you're going to need to work on that too.
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Don't forget... babies, toddlers and all children thrive on consistency.
Sweet Dreams!
B. Mazurowski
http://edusmiles.webs.com/