my milk smells just a bit off by monday too but my son takes it. what ive been doing is scalding some on friday, freezing it and then sunday take out some frozen and putting it in a bowl in the fridge to defrost. that way i keep my freezer stash fresh by cycling some and on monday he gets some fresh from friday and some scalded frozen. i like the idea of him not getting all scalded on one day.
sounds like she may be full in the am or just not be interested in the am.