Boleh je, tapi depends on baby's weight dan appetite la, most babies at that age drink around 4-6 oz every 3-4 hours, jadi 5 oz every 4 hours sounds reasonable! Best check dengan your pediatrician to confirm based on your baby's growth chart, sebab setiap baby lain-lain, some need more, some need less. A few of my mum friends noticed their babies' appetite changed quite a bit around this time, so just follow your baby's cues, if dia hungry sebelum 4 hours, bagi je, and if dia tak habis 5 oz, that's ok too. Congrats on your first, first time moms are always questioning everything, which is actually so sweet!