At DS1's hospital appointment on Friday the Dr gave us a jar and paperwork for a stool sample to test for lactose intolerance.
Since our GP is closed at the weekend I plan to get the sample tomorrow and take it in but I didn't think to ask her whether he needed cow's milk in his system for them to get an accurate result (we have put him on skimmed goat's milk and reduced his intake of milk).
Does anyone know?