Baby Cereal

Anyways, my little baby has just eaten her first baby cereal tonight! She's almost 4 months old and she still gets up in the middle of the night to eat. I wonder if the cereal will make her sleep through the night. She's a frequent/small portion eater. My friend told me her twins each eats 5 to 7 oz per feeding, but Casey is still on 4 to 5 oz. She already knows the best way to eat -- small portion at each meal. Ha ha.