Underfeeding, overfeeding atau normal?

Hi parents. Nak tanya la. Baby Baru 9hari. And now ada jaundice level 215 drop from 234. So Mmg kena kerap menyusu every hour. Dulu masa lahir Berat baby 2.92kg, susu xkluar lagi, baby sedut kosong je for 2 days Kat hospital. Terus naik kuning dia Sbb underfeeding and Berat drop ke 2.73kg on day 3. (Nipple latch pun issue jgk ni) So Bila Balik rumah, Mmg buat massage and pump breast bagi feeding thru bottle at the same time Sbb nak monitor berapa oz Dia minum setiap Jam. I do mix with formula Sbb nak turun kan kuning dia. Recommended 1oz per hour Sbb tank still kecik. Tapi my baby masa siang, Dia agak malas nak bangun but I kept feeding him hourly. Yes 1oz 1hour. That’s his limit sometimes tak Habis pun minum But time Malam, baby boleh minum 2oz in 1hour, sometimes he demands more(3oz). Kentut ada, kencing, berak semua ada. Xda pun jeluak or muntahkan Balik susu. Am I overfeeding him atau it’s normal? I perasan Bila susu badan Dia akan minum Lebih. But susu formula je kurang Btw this is my second baby. First baby pun jaundice jgk Tapi berbeza pulak dgn second ni. #ingintahu #jaundice