My baby started drinking 180mls at abt 6 weeks old, (he's abt 11 weeks old now) but these couple of days, his appetite seemed to have decreased. He's almost sleeping through the night or only needs 1 feed though. Is this normal?

According to the pediatrician, some babies just have bigger appetite than the others... & mine just happen to be one of them milk monsters! lol i feed him every 3 hrs+- during the day. Night time baby's less demanding now as he sleeps longer, say 5 hrs or so for the first feed, then 3 or 4 hrly after.