Attending Physician Anıl Yeşildal and Lactation Consultant Tijen Eren recommend that babies should not be bottle fed in the first month. If your baby refuses to suck, try to feed her with a syringe with needle removed, medicine dropper, coffee cup or spoon. Never give up on trying breastfeeding. Continue to pump your milk so that your milk production does not decrease.
Lactation consultant and childbirth educator Esra Ertuğrul explains the nursing strike performed by some babies on the 6th month
It’s not always possible to find the reason behind nursing strike. You just have to be patient.
It is best to be patient at times like these. So sit back and enjoy some top notch Winnie-the-Pooh wisdom, as you’ll soon be reading to your beloved baby: “…there is no worry. We shall get there some day!” Therefore during those days, you should breastfeed your baby every 3-4 hours to maintain milk production. Check each one of the possible conditions above and consult your pediatrician if the reason isn’t any of those.
Esra Ertuğrul
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My baby is not sucking! 6

Don’t panic, this happens and it happens a lot. Your baby, breastfed for the whole 6 months without a single issue may all of a sudden refuse to suck. This is called a "nursing strike". Show respect to your baby’s free will to strike (as you’ll have to go on doing this for the rest of your life:) Don’t worry; this one is temporary and lasts only 2-4 days.