My 4.5 month old has been EBF since birth. He's had a couple of bottles of EBM but otherwise just BF.
DH and I have an evening out planned tomorrow - our first since DS was born. My parents are coming to babysit and I've just checked the freezer and there's only about 100 ml or so of EBM. I am thinking of getting some emergency formula in as I don't really know how much he takes in a feed, but I don't feel great about it. I've read that formula could disrupt the gut flora. Just wanted some advice/perspective really. WWYD?