I gave DD some milk in a cup this am - out of a bag I had pumped earlier this week. Well, some dribbled down her shirt and I noticed that it smelled sour.
Is the milk bad? Is smell the best way to tell? Is it ok that DD drank some?
If so, I wonder what happened... I tend to send one bag to many to daycare so 1 usually comes back, but I thought they usually kept it cool all day.