Halen fed every 2 hours for the first 2/3 weeks, then he went to every 3/4 hours, but the past week it's gone back to every 2hours. He was also sleeping from 8pm-4am, now hes on n off waking every hour for 20mins, then going back off. From 4am he will feed every half an hour until about 8am, then he sleeps through till 11am. Could this be another growth spurt? With his other ones all he's done is fed every 2 hours and then cluster fed in the evenings for about 2/3 days, this time it's been about 7/8 days and still going?