I feel like my son is always starving! We barely make it to the 3 hour mark sometimes 2.5 is pushing it... He gets formula and breast milk, but def more formula. He sleeps anywhere from 8.5-11hrs each night and takes short 30/40min naps each cycle. I started giving him 6oz bottles of formula when he gets up and usually every other bottle is 5oz. I would say average is 30/32oz a day and one day he even had 37.5! I would say he's just under 13lbs and will be 12wks on Wednesday.