Hiya
This is just a suggestion and I find it works for me to get more oz's into him at night.
I give Calum his last feed at 7pm, he takes as much of his bottle as he can usually 5 - 7oz then he goes for his bath and then he get the last part of his bottle, usually another 5oz (yes I need to top up the bottle). I also put a scoop of baby rice into his bottle, he seems to like the slightly thicker texture.
lauren x
P.S he is on Aptimel 2 - for hungrier babies (from birth - 6months)