Is it ok to give my 6week old ds a bottle of formula when I go out tomorrow? I plan to leave him for about 4 hrs. I retrieved breast pump from the loft yesterday and the damn thing is broken. He has been exclusively breastfed from birth and not had a bottle yet. I know he might not take a bottle or even formula and I should have not left it so late etc. I have tried to express manually and I can't do it. I am reluctant to buy a new pump tomorrow as I only need to replace one part of it, which I can only get online, so....if I want to go out for a few hrs tomorrow will baby suffer if I leave dp to feed him formula? From what I've read it says baby might get digestive problems etc., but I am wondering if this is a small chance - is it likely he will get stomach upset from just one feed?