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If he’s taking through bottle means he’s able to take from nipple of bottle. From bottle baby doesn’t have to suck, only swallow. Whereas in breast baby has to suck and swallow both. Change bottle to Philips natural flow where he has to suck and swallow both Use nifty cup to feed instead of any bottle Every 2 hrs latch first , then offer cup or Philips bottle He needs to relearn latch sick swallow Also please check up for any infection with paediatrician

Once the baby is adjusted to bottle feeding then the baby will try to avoid taking breastfeeding.Consult paediatrician

Sometimes there will be confusion for the baby for nipple and bottle If he used to bottle feed Try with nipple sheild on ur breast for sometime and then start on ur breast For as a mother you may feel low but need to be strong and slowly they will get adapted to it May be sometime the flow will be less in breast but in bottle the flow will be at same rate may be for that also baby is choosing bottle Try these things first If any doubts can connect

Hi may be he is having cold nose block .or may be he is having colic issue sometimes stomach gets pressed while trying to breastfeed as postion might not be comfortable . Don't lose hope be patient try to feed him twice and gradually increase the frequency. Feed him when he is relatively calm not when he is cranky and hungry.Choose a bottle with natural flow and nipple mimicing nipple of breast . Go for paced feeding You can use sandwich method that is start bottle first then replace it with your breast. You may visit peadiatrian or breastfeeding consultant if very stressed

Can be due to nipple confusion in baby Bottle feed is easy for baby when compared with breastfeeding

As per you he was suckling well last two months, now he is refusing, I suggest you to consult a pediatrician, conditions might be oral thrush or difficulty in swallowing. I hope nipples are protruding nicely to latch.