Just a random thought but my supply always tanked a day or two before my period, so maybe it was hormonal or just a fluke. I wouldn’t send less to daycare than he’s been consuming.
@Diana ok thanks, that's what I thought too so topped with my freezer stash and we'll see how the rest of the week goes. I haven't gotten my period back yet but maybe this is a first sign of it 😅
You can ask what he is drinking and go from there. My daughter doesn’t drink nearly as much as she does at childminders as she does at home and so I send with what I get told she has and then a slight bit more just in case she is hungrier