M.S.
I had the same problem with my now 6 month old. Back when he was 14 weeks, he refused the bogttle. I got some great advice here. Check out the responses. I think if you click on my name you can see them. Anyways, i tried different nipples and that didn't work. He actually hated the nipples so then I went back to the wide neck Dr. Brown bottles and he started taking the bottle again. Only problem is that now he drinks the milk but won't drink more than 3 oz. Not sure how to fix that problem. But try a wide neck nipple that looks more like the breast and warm the milk and my dr also adviced me to warm up the nipple so it's at body temp. Hope this helps and good luck!