when my girl was 3 days old she was only just taking 15ml (half an oz) every 3 hours! try not to worry too much every baby is different and takes a while to get used to life on the outside! xx
Dnt worry he will put on weight it will just take him time. When my wee girl was a newborn she wud sleep 10 hours straight if let her. Now at 5 months b lucky during day if she naps 10 mins x
Yeah it is completely normal, when my son got weighed they said don't be surprised if he's lost birth weight most babies do, but he just piled it all on. But no it is very normal don't worry