Have you notice that milk (in the fridge) has different fat content at different times? I only pump sometimes, so I don't know if this is a time of day thing or a weeks of development thing.
This week I noticed a big drop in fat content.

Any insight?

ETA: LO is 2.5 months now, at 2 months he was in the 82 percentile for weight (13lb 5 oz), so he's a pretty big guy.