Hey AM..
Here you are thinking Miss K is under eating while I am the opposite with the same feeds besides having a bottle or two extra of formula???
I once asked on the forum whether she should be woken up for the 3rd feed in the evening and the ladies said no as two feeds are more than enough for their age. B is 5months now.
I guess as Yaz said, if its a sudden change then it would need to be checked out if not, leave her... Who forces you to eat when full huh??