Sounds like it is a phase. Strongly encourage not to force feed your baby. I was very worried about the reduce intake in the past so I force feed my baby end up she got bottle aversion which make it difficult for me to feed my baby. When there is reduce in milk intake.Just make sure that there is output. Perhaps instead of 150ml.U can try to cut to 120ml first so that u don't waste too many milk. Adjust the milk temperature to cool abit as it could be a possibility that she is ?teething. just try an error. Don't worry.She will be fine :)
My baby also has on and off phase with milk! Sometimes suddenly got one period he drinks very little, less than half the amount and last few days. Then suddenly ok back. I think as long as your baby has good diaper, per poo well, active means its quite fine
It’s a phase that happens from time to time. Baby will resume drinking more after some time.