Thinking of leaving DS with the ILs for a w/e away but he refuses any kind of milk (expressed, formula or cow's mlk) in any kind of bottle/cup/beaker/straw cup. HV (or actually I think she's a NN) said he'd be fine for a w/e without milk as long as he had yogurts, milk on cereal, cheese etc. Is this ok or should I ignore her? Gut instinct says he needs milk but that might be me feeeling I need to feed him. DS is just shy of 1 yo.