my girl also drink lesser once she hits 4m but as long as the baby is growing well you don’t have to worry so much. also, babies get easily distracted at this age so you can try to ensure there’s lesser distraction while feeding.
It could be a milk strike. It’s normal as my girl has it too. Just feed on demand and according to her cues. Don’t force feed or else it will make it worse. Also, u may try to change ur teat size to see if it improve
my baby also drinks lesser when she is 4 mths old. she will rather stuff her hands into her mouth instead
Feya