DS2 is 12.5 weeks old. At 10 weeks he weighed 15lbs4 so he is a big boy. Yesterday and today he has taken so much I'm a little worried he's over feeding?! I make 8oz bottles which by the time you add the powder makes it 9oz. He takes 6 of these between approx 630am-9pm and then sleeps through the night. Today he fed at 640, 830, 1130, 230, 5 and 730. The 830am and 730pm ones were drained. He took approx 48-50oz today. Should I be worried???