DS is 12 weeks and breastfed but does take bottles of expressed milk. He usually goes down for the night at 9:30/10
Twice I have left him for 5ish hours from 7-12 and both times he has slept the whole time. Yesterday he slept from 5pm till 5am! So from 2 hours before I went out until I came back.
I spoke to my friend and she said her baby (same age) slept the entire time she was out at work (5-10). Is this a thing baby's do when they can't smell the milk?