I agree with Corrina. If he's taking all of his bottles during the day, including the extra you've been giving him, and taking a full bottle at night, he must need it. Like she said, ask your ped. about the hungrier baby formulas, but I wouldn't try to phase out the night bottle until you are more sure that he is not indeed hungry in the night. But, yes, that is one way to try to drop the night bottle.