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11-week-old suddenly fussy with bottles and taking less formula

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Applelilley · 12/03/2026 13:10

So my LO is 11 weeks old and formula fed.
from around 6 weeks he was drinking 5-6oz of milk every 3 hours (may seem a lot for 6 weeks but he was born a big baby with a big appetite!)
since 9 weeks he has been completely fussy with his bottle and struggles to drink more than 3oz it’s a push to get 4 in him. This also takes a full hour and his wind takes forever to come up, with wind coming up hours after still.
I’ve tried different teats, slower and faster. Different shapes etc. This did begin after his vaccinations so originally put it down to the rotavirus vaccine however since it’s now been 3 weeks since having his vaccines I feel something else is at play. I did debate silent reflux but he has no issues being lay flat at all. For his weight he is expected to have around 32oz a day and I’m struggling to get him to 25. He also used to burp so easy and now it’s a struggle it takes so longer and will only come up in the sitting up right position. I can appreciate some say if he doesn’t want it it’s full but often he will struggle for the 4 fall asleep then wake 30 min later wanting 2oz which means he’s been unsatisfied in his feed to me. Has any one had similar experiences, again I’m aware 6oz can seem a lot but for a baby to be happily drinking this for 3 weeks then struggling to get 3 down this is a huge decrease and he hasn’t gained any weight since 😊 any advice appreciated

OP posts:
Are your children’s vaccines up to date?
SleafordSods · 13/03/2026 17:34

Have you tried adding Dentinox to the bottles @Applelilley? Smile

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