Is it normal for my son to be eating 4 ounces of formula every 2 hours? This just started yesterday. He is 2 and a half weeks old. From the day he was born till yesterday he would eat on average 1-2 ounces every 2-3 hours. I know the older and bigger he gets, the more he needs to eat but this is a dramatic change. He is having bowel movements regularly so I know there isn't a problem with his digestive system. Any of you other parents experience this?