My buns have veggies everyday. They do not get diarrhea from being fed greens daily. In the wild, the vast majority, if not all, of a rabbit's diet would be fresh food. Fresh greens are an important part of rabbit's diets and they provide additional nutrients, as well as variety in the diet. It is a myth that feeding buns lettuce/too much lettuce gives them upset stomachs. They can and do get diarrhea when they are introduced to a new type of greens too quickly and in large amounts in the beginning, however.
Anyway, @TacoBellWinnieP , best of luck with Oreo! Hopefully your friend will see sense and let you take care of him soon.
