Hi Natasha
Just wanted to jump in with some bottle/breast thoughts for you, as I've gone through the bottle preference problem and come out the other side - so it is possible! I pumped and bottle fed very early due to severely cracked nipples. It was only for about 3 days, but it led to a little over 3 months of breast refusal before I coaxed Dylan back to bfing. It's actually very easy for a breastfed baby to develop a bottle preference: Milk flows much faster from a bottle, so babies don't really have to work for it, and there's instant gratification, rather than having to wait for a letdown.
Here is a page from Kellymom.com with some tips you might find helpful (I did!):
http://www.kellymom.com/bf/concerns/baby/back-to-breast.html Here's a couple of important points from the page (I just copied and pasted) but check out the whole thing when you have time
The two primary rules when you have a baby who is having problems nursing are:
1. Feed the baby. A baby who is getting the right amount of calories and nutrition is best able to learn how to nurse. First choice for what to feed a non-nursing baby is mom's own milk, second choice is banked milk from another mom, third choice is infant formula.
2. Maintain milk supply. If mom's milk supply is being maintained with an appropriate frequency and amount of milk expression, more time is available for baby to learn to nurse, and baby's efforts will be better rewarded (with more milk).
General tips
Your goal is to coax baby to the breast. Do not attempt to force your baby to breastfeed. Forcing baby to the breast does not work, stresses baby, and can result in baby forming an aversion to the breast. As baby gets better at nursing and is able to get more milk via nursing, he will grow to trust that breastfeeding works and will have more patience when latching.
* Wear clothing that allows very easy access to the breasts. Baby may get very impatient in the split-second it takes for mom to lift the blouse and undo the bra. Spend time, if possible, in a warm place that allows both mom and baby to be naked from the waist up.
* Lots of skin-to-skin contact can help your baby nurse better and even gain weight faster. Keep your baby with you as much as possible, and give him lots of opportunities to nurse (even if you're not successful). Get skin-to-skin with him, first when he is sleepy, right after a bottle feed (or however you're supplementing). This way baby has the opportunity to sleep and wake up happily, skin to skin at mom's chest, and mom is right there to catch the earliest hunger cues. If baby moves toward the breast and then falls asleep before even mouthing the nipple, or after sucking twice, then these are positive baby steps, not failures. (Read more about kangaroo care or take a look at the book.)
* Offer the breast often. Try breastfeeding in baby's favorite place, in his favorite position, in the bath, while walking around, while lying down, with baby upright, baby flat on his back, in his sleep, just as he is waking, any time baby looks as if he might be interested, or any other way you can think of, i.e. any time, anywhere.
* Avoid pressuring baby to nurse. Offer in an ultra-casual way and pretend you don't mind if he refuses (easier said than done, but try not to show any frustration - your aim is to avoid pressuring baby to nurse). Don't hold the back of baby's head or push or hold baby to the breast. If baby pulls off the breast, then don't try to make him go back onto the breast at that time - simply try again later. If baby seems frustrated with your offering the breast, then turn the pressure down and simply make the breast available (lots of skin-to-skin!) without offering. It can be helpful to have lots of skin-to-skin time with baby where he is cuddled at the breast with no pressure to nurse - give control over to your baby, so that baby decides if and when to nurse and when to stop nursing.
* Carry your baby close to you (a sling or other baby carrier can help with this). "Wear," carry, hold and cuddle your baby as much as possible; carry baby on your hip while doing other things, play with baby, and give baby lots of focused attention.
* Sleep near your baby. If baby sleeps with you, you'll get more skin-to-skin contact, plus baby has more access to the breast (see this information on safe co-sleeping). If baby is not in the same bed, have baby's bed beside your bed or in the same room so that you can catch early feeding cues, breastfeed easier at night, and get more sleep.
* Nipple shields can be helpful at times for transitioning baby to the breast. Talk to your lactation consultant about using this tool.
* Comfort nursing is often the first to come, followed by nutritive nursing. Offer the breast for comfort any time you see a chance- at the end of a feeding when baby is not hungry, when baby is going to sleep or just waking up, when baby is asleep, and whenever he needs to comfort suck If your baby is actively resisting nursing, then try encouraging comfort nursing after baby is comfortable with skin-to-skin contact. After baby is willing to nurse for comfort, you can then proceed to working on nursing for "meals" as well.
You are working to seduce your baby back to breast. Again, coax, don't force!
Me again now
Just wondering if your lo's reflux is under control? Is he on medication? The reason that I ask is that it is relatively common for babies with uncontrolled reflux to develop breast and/or bottle aversion. Because feeding causes the stomach contents to reflux, thus causing pain, babies can associate that pain with the breast and/or bottle. That may be another reason that your ds is preferring the bottle - he associates his reflux pain with the breast, but not yet with the bottle. If everything is under control, then that will definitely help you in coaxing him back to breastfeeding. If not, you may find it much more difficult
Let us know what you think? Hope things are well