I have lost count of the number of COs my mother has cooked for over the years, often having them to stay for the week of their visit.
They were all pleasant enough in their own ways, but a nightmare to feed! I used to think it was a coincidence that so many COs wives seemed to have very complicated and strange dietary needs. They all seemed to have an accute intolerance to either dairy/wheat/salt/sugar etc... etc..., in fact most food that the majority of the population managed to eat without any problems.
They often drank strange concoctions instead of tea of coffee, which had to be provided at set times, and I can remember one CO's wife insisting that she could not have anything to drink at all for two hours before or after her meals.
I can remember discussing it with my Mom and we wondered if all the travelling about caused digestive problems for them, as they all seemed to be so difficult to feed.