My son is 14 months old and has been drinking whole cows milk for the last six weeks or so. For the last couple of weeks (at least) he has been pooing in the night (explosive) and has a very sore bum. His nursery nurse has noticed a bit of blood a couple of times on wiping. In general his poos have not seemed “normal” for quite a while. I feeling guilty for not having had this thought sooner but I wonder if this might be a sign of a cows milk intolerance? Any advice would be much appreciated.