My daughter will literally nurse for over an hour and a half if I let her and still act like she's starving after. So I have been pumping bottles of breast milk and let her nurse for about 50 mins and she will still drink about 2 oz after nursing. I don't mind it during the day but I was thinking of letting her nurse for about 45 mins at night and then give her 2 oz of formula so she will get full and stay full a little longer. Anyone do this with their lo?