It's quite common for newborns to feed frequently, especially at 1.5 months old. Their tiny tummies can only hold so much at a time, so they often get hungry sooner than we'd expect. If your baby is thriving, gaining weight well, and seems satisfied after feeds, it's likely normal. However, if you feel the current formula might not be satisfying your baby's hunger or causing discomfort, it might be worth considering a change. Sometimes babies need a bit of adjustment to find the right formula that suits them best. Also, ensuring they are getting enough during each feed is crucial. You might want to assess the amount you're giving and perhaps increase it slightly if acceptable for their age and weight. If you're still concerned or unsure, consulting with your pediatrician is always a good idea. They can provide personalized advice based on your baby's growth and health. Additionally, if you're looking for a reliable breast pump to help with mixed feeding, you might find this one useful: [Breast Pump](https://invl.io/cll7h6h). Take care and all the best with your little one! https://invl.io/cll6she